Wow! After having read most of the answers to J.'s question, it appears to me that the vast majority of those who replied to her failed to see that it was HER HUSBANDS friends who'd be coming to this party. And, yes, I can fully understand just how, and why, she would/could feel OBLIGATED to host said party.
My children are currently in their late teens, but I DO remember what it was like to have young ones in the house, and the lack of sleep associated with caring for them. While it's great, having kids, the first few years can be so hard on a mother, when she's constantly having to get up at night for feedings, changing diapers, etc....ESPECIALLY when she gets up for these things, and then can't get back to sleep herself!
I'm wondering, too, if it's so rude for her to excuse herself to put her children to bed, and then hit the sack herself, uuuhhh.. what's she supposed to do??.... Stay up "entertaining" until she just passes out in the Living Room??
Personally, (and yes, Im being a bit of a smart aleck, here) I think she should tell hubby that if he MUST host this party, that HE host it, and to find somewhere other than their home to do so. And btw, I thought it extremely rude of him (J.'s hubby) to spring this on her at the last minute. Event's like this take planing, and preparation. Neither of which it sounds as if she's had much time for.
J., if the friends dont want to leave when you need them to, simply call them a taxi, (at their expense) and tell them "the fat lady's done sung" and "it's over!" Perhaps they'll get the hint, then.
Hope this helps.
Wishing you the best with this.
T. B.