How might fostering affect children already in our family?

The main effect of fostering on children already in your family is that they become part of a household where another child’s needs, history and relationships must be taken into account. The impact will depend on their age, personality, understanding of fostering, the type of placement and how well the arrangement fits the household. A careful assessment should consider their views and welfare, not only the adults’ readiness to foster.

Your child’s views matter during assessment. Children should have opportunities to ask questions and express concerns in language appropriate to their age and understanding. They may be enthusiastic, uncertain, protective of their home or worried about what will change. A child does not need to give an adult-style explanation for their feelings to be taken seriously. If they are strongly opposed or appear distressed, this should be discussed openly with the fostering team before any decision is made.

Help them form a realistic picture of fostering rather than presenting it as simply having a new brother or sister. Explain that a child coming to stay may have experienced neglect, abuse, separation or several previous moves. This can affect how they communicate, respond to adults, manage frustration or behave around possessions and personal space. These behaviours are not necessarily directed at your child, but they may still feel difficult or confusing. Explain what adults will do to keep everyone safe and make clear that your child will not be expected to solve problems.

Protect their role within the family. Children in the household should not become informal carers, mediators or sources of emotional support for a fostered child. They can be kind and welcoming, but responsibility for supervision, boundaries, transport, behaviour and communication with professionals remains with the adults. Do not ask them to keep secrets, pass on messages about the placement or manage situations that make them uncomfortable.

Practical boundaries should be agreed before a placement begins. Discuss:

• which belongings, devices and personal spaces are private;
• what household rules apply to everyone and which arrangements may need to differ;
• whether children can enter one another’s bedrooms and how privacy will be maintained;
• what your child should do if they feel unsafe, worried or unsure;
• which information about the fostered child must remain confidential; and
• how adults will respond if there is an argument, accusation, disclosure or safeguarding concern.

Your child should know that confidentiality has limits. They must not share a fostered child’s personal history, photographs or family information with friends or online. However, they should always be allowed to tell a trusted adult if something worries them. Give them simple, clear instructions about who to speak to, without requiring them to investigate or prove what happened.

Matching is an important safeguard. The fostering team should consider factors such as age, gender, bedroom arrangements, school and community links, known behaviours, pets, family relationships and the needs of everyone already living in the home. A placement that is unsuitable for the household can place pressure on both the fostered child and your own children. You should be able to discuss relevant information with the fostering team and ask how the proposed arrangements may affect your family before agreeing to a placement.

Different placement types may create different effects. A short-term placement may involve uncertainty about how long a child will stay, while a long-term placement can alter family relationships over a longer period. Emergency placements may allow less preparation. Placements involving sibling groups, teenagers, children with complex needs or children who have experienced trauma may require particular planning. Your fostering team should explain the known needs and risks as far as confidentiality allows, together with the support and safety plans that apply.

Children already in the family may experience mixed feelings. They might feel proud of helping, jealous of the attention a fostered child receives, embarrassed by behaviour at home, worried about losing their parent’s approval or upset when a placement ends. They may also find it hard if adults appear to make allowances for behaviour that would not usually be accepted from them. Acknowledge these feelings without comparing the children or asking your child to be more mature than is reasonable. Fair treatment does not always mean identical treatment, but every child should have their needs recognised.

Make regular one-to-one time for each child and keep communication open after a placement starts. Ask specific questions rather than relying on a general “How are you?”. For example, ask what has felt easy, what has felt uncomfortable and whether any household rule is unclear. Watch for changes such as withdrawal, persistent anger, sleep problems, school difficulties, physical complaints or reluctance to be at home. These signs do not prove that fostering is the cause, but they should prompt a calm conversation and, where necessary, advice from the fostering team or another appropriate professional.

Placement endings can also affect children in your family. Even when everyone understands that a move is planned, your child may feel grief, anger or guilt. Avoid promising that a fostered child will stay permanently, and avoid asking your child to conceal their feelings to make the ending easier for others. Talk about what information can be shared, how contact will be managed if appropriate and who your child can approach for support.

Before applying, consider whether your household has enough emotional capacity, privacy and flexibility to meet a fostered child’s needs while protecting the wellbeing of your own children. Include them in suitable conversations, maintain their right to boundaries and treat concerns as useful information rather than disloyalty. Your fostering assessment and ongoing support should help you review how the arrangement is affecting everyone and identify changes needed to keep the household safe and stable.