It will if they are encouraged to stay on to spend the evening with dad.
It is where they sleep that counts and presumably there will be plenty of negotiation before the actual divorce. One thing I can tell you is that the courts take quite a dim view of the children's residency being decided upon to avoid the payment of maintenance. CAFCAS are very aware of this sort of thing. Anything they do will be deemed to be in the best interests of the child, not his pocket.
Of course anything can change after the divorce but in the first instance it can be determined by the courts and a good solicitor will protect the interests of OP's step-grandaughter. We can only go on the information given here and we don't know whether Dad works or what the full details are which could have a bearing on the whole thing.
Where can I donate a wheelchair apart from the tip?
