After endless fretting about what to do with ds1 (21 months) when ds2 is being born, I thought I had come up with a great solution. SIL (my emergency childcare person) offered to take him away to MIL's house (i.e. ds1's grandmother) along with her dcs for half term. SIL knows ds very well, and he adores his older cousins.
Yesterday mw asked me what I was going to do with ds1. When I told her of this cunning plan she said it was a really bad idea, and it could upset him to come home and find a new baby in the house, and that some children never forgive you for this sort of thing.