I have two dc and since having them have only worked PT. They are at school now but before they started I was fortunate enough to have family help, mainly my DPs but dh's family did help out a bit too. Now my DPs take them to school and pick them up on my working days. No money has ever been involved as my DPs have always been adamant it was a pleasure.
My dsis had her first baby last year and is now planning to go back full time having originally considered dropping at least one day. While she's been on mat leave she has helped with the school run etc and we had discussed helping each other out if our days off don't match - we hoped they wouldn't so we can have each other's kids.
Now she is planning to go full time as she thinks she'll get behind in her career and wants the money to extend her house. She still wants me to have her dc on my two days off and my dps will have him on the other three. Having discussed it with dh I kind of feel I'm subsidising her. I would be better off financially if I worked f/t and would have advanced at work and now she will be doing that while I have her dc for free. Also, my DPs will have it full on with a baby three days and school runs. I don't know, it just doesn't sit right, but AIBU?