FamilyFX: The Family Reset System

What if my other child resents their brother or sister?

Hear what resentment is pointing to, change the family arrangements that are costing the sibling and protect their right to a life of their own.

By FamilyFXWritten May 2026Published 6 August 2026Last reviewed 17 July 2026Next review due 17 July 20276 min readReviewed by FamilyFX
A mother and her son sit together on a bench outside their home, talking quietly with a mug beside them.

The short answer

Do not correct resentment before finding out what it is protecting. Ask privately about the moments that feel hardest: cancelled plans, damaged belongings, unequal access to a parent, fear, noise, embarrassment or caring work. A child can love their sibling and still resent what family life asks of them. Name the cost without blaming either child. Then change something adults control, such as protected time, supervision, privacy, replacement of damaged possessions or who carries a regular task. Explain necessary differences in plain language, but do not use diagnosis to close the discussion. Keep substantial caring and safety responsibility with adults. Do not demand affection, gratitude or reassurance. Judge progress by whether the child can speak honestly and regain parts of life that belong to them, not by whether they stop expressing anger.

  • Treat resentment as information about an unmet need or repeated cost.
  • Ask about specific parts of family life rather than demanding a verdict on the sibling.
  • Change an adult-controlled arrangement instead of arguing the feeling away.
  • Keep safety, supervision and substantial caring responsibility with adults.
  • Do not make warmth or closeness the condition for receiving support.

Hearing "I hate him" or "everything is always about her" can leave a parent pulled in two directions. You may want to defend the child who needs support and reassure yourself that the family bond is intact.

Resentment is not a verdict on the relationship. It is often the rough language around a more specific cost. Finding that cost gives you something useful to work with.

Do not begin by correcting the feeling

Responses such as "she cannot help it", "you know he has additional needs" or "one day you will understand" may explain the adult's position. They do not tell you what the sibling is living with.

Try:

"Something about this feels unbearable at the moment. I will not tell you off for saying it. Which part has been getting to you most?"

A child can feel affection, protectiveness, embarrassment, anger, relief, jealousy and worry at different times. Sibs describes sibling experiences as varied and changing rather than one predictable emotional pattern.1 Do not require a balanced account before you listen to the difficult part.

Notice your own urge to make the child withdraw the words. You can set a boundary on insults directed at somebody while still making space for the feeling in a private conversation. "I will not let you call her names, and I do want to hear why you are this angry" keeps both responsibilities in view.

Find the event underneath the general statement

Ask about a recent time rather than the whole relationship:

  • What happened just before you felt that way?
  • What did you have to stop, give up or wait for?
  • Did you feel frightened, ignored, embarrassed or responsible?
  • What did you wish an adult had done?
  • Does the same thing happen often?

"She ruins everything" might mean a birthday ended early. It might mean belongings are repeatedly taken, the child cannot invite friends home, or every outing follows one person's capacity. "He gets away with everything" may point to a rule nobody has explained, or to harm that adults have explained but not repaired.

Write the concrete issue in neutral terms. "Two football practices cancelled this month because no adult could take him" is easier to change than "jealous of sister".

Name the cost without making either child the problem

Do not ask the sibling to choose between compassion and honesty. Both children can have legitimate needs that collide.

Say:

"Your sister needed me at the appointment. You also lost the concert we had planned, and I did not arrange anyone else to take you. That mattered."

This does not blame the child who had the appointment. It places responsibility for the family arrangement with adults.

Sometimes the cost is not inconvenience but fear. If there has been hitting, threatening behaviour, trapping, deliberate damage or a child no longer feels safe in ordinary parts of home, respond to the safety problem. Do not treat fear as sibling jealousy. The guide on what to do when a sibling has been frightened or hurt at home starts with protection rather than reconciliation.

Change one thing the child can experience

An honest conversation matters, but it will feel hollow if the same arrangement continues. Choose something adults can alter:

  • replace or repair a damaged possession;
  • protect a bedroom, shelf or device from uninvited use;
  • arrange another adult for one recurring activity;
  • keep one plan even when the whole family cannot attend;
  • separate children at a predictable conflict point;
  • give the child direct access to a parent at an agreed time;
  • stop using them as the messenger, interpreter or calming person; or
  • tell relatives not to question them about their sibling.

Give a review point: "We will try separate after-school spaces this week and check on Sunday." That is more credible than promising that family life will now be fair.

If adult capacity is the pressure point, make individual time small enough to keep and repair it plainly when an emergency interrupts it.

Explain differences, then stay for the response

Some arrangements will remain different because needs, risks and access are different. Explain the relevant reason in language the child can use:

"You both need sleep. Your brother uses headphones and has a later shower because the bathroom noise is painful for him. You need the landing kept quiet after nine. Those plans look different because the barriers are different."

Then ask what the arrangement is like for them. An explanation is not proof that the effect is acceptable. The detailed guide to different rules and unfairness helps separate an accessible difference from an avoidable cost.

Avoid sharing private diagnostic or medical information merely to justify a rule. Explain what the child can see and what adults will do.

Take caring responsibility seriously

Helping with an occasional household task is different from carrying responsibility for another child's safety, personal care, medication, communication or emotional regulation.

Notice whether the sibling:

  • misses school, sleep, friends or activities to help;
  • stays alert because they believe nobody else will notice danger;
  • cannot leave home without arranging care;
  • regularly interprets or speaks for their sibling; or
  • feels guilty when they say no.

The NHS says young carers should not be doing adult-level caring work or so much care that it interferes with school and ordinary life.2 That page concerns rights and assessment in England, so use the relevant route in your UK nation.

Tell the child which tasks adults are taking back. Do not praise maturity in a way that makes refusal feel selfish.

Do not make closeness the outcome

Parents may hope for affection, shared activities or lifelong mutual support. The children cannot be assigned that future.

Do not require the sibling to:

  • include their brother or sister in every friendship or activity;
  • answer personal questions from other people;
  • accept damaged belongings to demonstrate understanding;
  • promise future care; or
  • reassure adults that they love the family.

The immediate aim is smaller and more respectful: this child can speak without punishment, has parts of life protected and is not carrying adult work. Warmth may grow when pressure reduces, but it cannot be demanded.

Keep checking the arrangement, not the performance

Do not judge progress by fewer angry words alone. A child may go quiet because speaking felt futile.

Check what changed:

  • Has the recurring loss reduced?
  • Can the child use their room and belongings?
  • Are they sleeping, attending school and seeing friends?
  • Can they decline a caring task?
  • Do they know which adult will respond when something goes wrong?

You can dislike hearing resentment and still make room for it. The feeling does not need to be approved, erased or turned into a lesson. It needs to lead you towards the part of family life that deserves closer attention.

Footnotes

  1. Sibs provides UK specialist guidance about a range of sibling experiences. It does not establish how any individual child feels or why.

  2. The NHS page describes young-carer rights and assessment in England. Arrangements differ in Scotland, Wales and Northern Ireland.

Sources and further reading

  1. [1] Sibs. Your sibling child's experiences. Current specialist guidance (accessed 4 August 2026).
  2. [2] Sibs. Dealing with sibling rivalry. Current specialist guidance (accessed 4 August 2026).
  3. [3] NHS. Being a young carer and your rights. Current England service guidance (accessed 4 August 2026).