Still Not My Kids!!!!

just tell her that you don't mind her kids coming over to play, but she needs to accompany them. just tell her it's hard enough to watch out for your own child and that you would feel terrible if anything might happen to them since you can't keep a close eye on them. suggest setting up structured playdates and switch off what days the kids go to each other's house...that way it's not always on your shoulders. if she doesn't take the hint, just send the kids home wehn they come over uninvited and tell them you are having "family time" and no one else is allowed over right now.

Be 100% honest. Tell her there is a little bit of a situation that has come up since they moved in and you're hesitate to tell her because she is a dear friend and you never want to hurt her in any way, but something is bothering you that she is doing unintentionally to you.
She will say OMG what! (because I'm sure she dosen't want to hurt the friendship either)
Then tell her that when she lets her kids out to play that they come over to your house and you feel responsible for watching them, but she never said anything to you about watching them, but you feel somebody should, and although you adore them, you feel like they are being pushed on you a little. Tell her if you are or are not okay with watching them from time to time, and ask her help in figuring out how to stop this so that neither of your feelings get hurt.

I have to agree with you .I hate when parents do this .As a mother I could not imagine letting my kids out at that age with out somekind of parental control,then again they know you are there. I think they are taking advantage of your kind heart .If they are not that close of friends and you are not worried about hurt feelings I would just go talk to them and explain things .

some people will always take advantage this happened to me until one day i just told her that i didnt know if she knew or not but her kids were at my house and we were trying to eat and i didnt know what to do so she might want to get them after that she kept tham at her house unless we were all together i just cuoldnt understand why she did sent her kids over all the time with me being a single parent and her being married i hope this helps

To play devil's advocate a little here . . .
With 2 preschoolers and a newborn, it is likely that your friend is feeling a lot of tension trying to meet the needs and demands of each kid. I can just picture the older children begging to be outside, the newborn needing to be feed, dinner needing to be prepared, and hubby not home from work yet. This may or may not be the story, but I know it is a regular scene in my home!

That said, what your friend may be looking for is a little escape or help once in a while! No, that doesn't mean she should just dump her kids on you (especially without communicating with you first), but why not talk with her frankly and see how she's doing with the recent family changes?

Perhaps if she is swamped and you wouldn't mind, you could offer to watch the older kids outside (your son is playing anyway) for a set period of time (i.e. 1 hr) once or twice a week so she can get dinner ready, have a few minutes with the baby or her husband, etc. By setting up expectations, it's easier to send the kids home while staying outside. (i.e. "I'd be glad to watch the older kids for an hour while you ____, but then we love to have some family time each night - just us.")

In the meantime, take it as a compliment that she trusts you with her precious children, and that her kids enjoy playing with your son! But have an open, honest talk soon!