EDIT If I invite your child to a party I expect you to stay
We went to a birthday party over the summer at a pool. All the parents dropped off their kids and left. The ages of the kids were between 9 and 2. Dh and I were the only parents there including the birthday girls parents.
The ages of the kids at my party will be between 10 through 2
Edit: my dd will be 3 years old. Invited people who have kids between thoughs ages. My dd doesn't go to daycare and I'm a sahm. That's why the age range is large. A couple of the familys I don't know because they work at dh job. The other child is my neice who is 7 but she lives far from here. I invited my neighbor who has 2 kids ages 2 and 7. She didn't want to stay but I know her 7 year old won't watch the 2 year old.
Yes I will be busy doing other stuff and watching my child. The party is not at my house and the people who work at the place have to monitor ALL children there not just the party kids. So yes I expect parents to stay and watch their kids.