DP and his EXw work full time.
I work only term time and have done since I became a single parent (so being with DP doesn't find this life choice.)
DPs ex is asking us to have their kids more in the holidays and when he's saying he can't cause he's at work she's asking why I can't look after them. Technically I could but I have my own DS who I want to give quality time to and am also pregnant and my job is very demanding so in my time off I just want to have fun with my DS.
DP says he completely understands this and tells his ex that their kids aren't my responsibility to look after.
AIBU though? When she is genuinely stuck I do help out but I feel she is just using me for childcare more and more. DP pays considerable maintainence and she is practically mortgage free so can afford childcare.
I've said no to extra requests this holiday but she is really pushing saying its unfair that the children won't be at ours as much as they were last summer (when DP had a more flexible job and could be around for them more. )