Huge backstory of DP's ex taking the piss with contact, changing or ditching weekends at the last minute, us having to change our plans so that we can have DSD at short notice, 'favours' never being reciprocated, etc.
DP and ex have DSD 50:50 although in practice we have her a bit more than 50% because of situations like this one.
Ex is going on holiday with her partner (aside: she's never taken DSD on holiday, whereas we never go on holiday without DSD). So we're having DSD for the full fortnight.
But ex is stuck for after school childcare on the days that DSD would normally be with her (we have a childminder / I do it on our days), so has asked DP to basically ask me if I'll do it.
This is massively inconvenient for me. I'm on mat leave with DD. I've got a term's worth of baby groups paid for up front and I'd have to miss those sessions and lose that money in order to pick up DSD. Same story with an exercise class I've block-booked in advance.
Apart from that, I feel like it's her problem to solve, not ours. She's suggested to DP that if I can't do it, he pay for our childminder to have DSD. I think she should pay since she's the one going away.
AIBU?