I think the op is the nanny. Simmer down people. Yes nanny has a right to say no and both sets of parents should respect that. At a bare minimum nanny should be compensated handsomely for the aggravation of dealing with two kids who don't get along. She should also be given $100 to go to an activity that will keep them engaged and not fighting and out for lunch. The day might be manageable then.

Op sounds pathetic. Seriously you have issues if you can't see the problem here.

Why would you invite a child who doesn't get along with your own child for a full day? That sounds like asking for trouble no matter who is overseeing things.

Can a nanny say no to an extra child all day.. aka free child care? Yes, of course she can.

Nanny would also be wise to say no to supervising an actual play date with a child she knows her charge doesn't get along with.

MB here. I agree that a ten hour day is not a playdate.

I do expect our nanny to supervise playdates with the kids but I never ask her to provide childcare for other children - just to make sure she is always around my kids.

I would not expect (or ask) our nanny to continue to take our kids on playdates with other children with whom there is routinely a problem if she is uncomfortable in any way.

Only slaves don't get to say no.

ABSOLUTELY the nanny has the right to say no. I certainly would! What a horrible thing to even ask your son;s nanny to do!

Op you don't sound very bright. 10 hour play date!

I agree. That's not a play date, that's childcare.
I would be uncomfortable too, watching a child I know my charge doesn't get along with. So if she says no, MB needs to respect that.

Can your son go to the other boys home? Or are his parent working so they are hoping for free care from your nanny? 8-6 is a long day. If nanny agrees to that, the boys parent should absolutely pay the nanny for it.

No normal playdate is ten hours long. 8-6 is not a playdate.

Agree with PP, This is not a playdate, This is Nanny providing free childcare. She has a right to say no.

This is not a play date, this is a babysitting job.

Would you prefer employee? Because she definitely is that with respect to the parents.

She's not your nanny. She's your child's nanny.

And is it okay for her to say no?

Here's the situation. Mom asked nanny to supervise playdate. Nanny states that she knows the boys don't really get along. Every day at school (and now camp) there is a situation between the two of the kids. Nanny said she doesn't feel comfortable with this play date on Friday when there is no camp. Nanny would be with the boys in the nanny family's home and will be from 8 am till 6 pm .