Not sure if this is an AIBU more of a WWYD but here goes:
I have a great nanny, then she got pregnant, went on maternity leave and came back with her baby at 4months. We agreed all this, I wasn't 100% convinced but my son started reception but not full time as he has development issues and my daughter yr2 in September so I figured it would work out as they would be at school. When she started back, we agreed we would check in regularly to make sure it was working for both of us. She's on a new contract which I have had to adjust after a month as the previous hours affect her baby's routine, and actually its fair to say the baby doesn't settle/sleep well at mine. I work from home or in the office 3 days a week which are the days she works, and my work is really flexible so I can be flexible with her. We've been muddling through and seeing how it goes. But this week her baby has picked up a cold from my son and has not been sleeping, won't settle and so neither of them are getting any sleep. I've let her come in late and leave early yesterday as I needed her rested for today as I would be in meetings from late morning. I had a chat with her yesterday as well as I know she isn't getting much support at home, but also she's doing all her own housework etc and all the baby stuff, so I want to make sure she is coping ok. I offered a later start today as well and took my kids to school as I was working from home in the morning. Anyway, today her baby won't settle, won't sleep, won't take milk so she hasn't made it in and is now taking her to the doctors, which is fine, and fortunately my meetings have been cancelled so I can sort the kids myself now (including a lunchtime pick up). But it's not an ideal scenario for me and probably stressful for both of us, and I really don't know what to do moving forward. Moving into the winter, and from my own experience with my kids, colds are going to be a very regular occurrence but I don't want to be let down or have my kids left to their own devices because she is tending to her own baby. I have raised this with her as well, and she gets it, but I think both of us underestimated how challenging it would be. Scenarios going through my mind include giving up work, getting a different nanny or using after school clubs (but that might not work for my son). She's like to try a few more months so I am wondering what a reasonable time period would be. Personally I think she came back too early (her choice, I used an au pair and holiday camps to cover her maternity but could have continued). I want to do the right thing ( I topped up her mat pay so she didn't feel under pressure to come back to early) but I also don't want the added stress that it puts on me, and also, because she spends time with her own baby feeding, soothing etc, she's not getting as much of the children's admin done as she used to. She's on the same hourly rate as previous, I haven't reduced it because she's bringing her baby so I'm struggling to see the pluses at the moment.
FWIW to add context, my husband works very long hours, leaving before 7.00am and getting home after 9pm and occasionally travels, so I don't get any help from him, so all chores, cooking, kids, errands etc fall on me.
Any useful advice much appreciated, thanks.