I have to agree with PB&J that it's a bad idea to have any children present during a swinger party. In my book of rules, kids should not be present where swinging is likely to occur.
Even if I were open to it, I think it would be difficult to completely relax and enjoy hosting a party knowing my children may need my care or attention at any time. Will I hear them cry if they are upset or hurt? Will they surprise me and walk in when they shouldn't?
Have you let those you've invited know that your children will be present? If I learned this, I wouldn't attend a party. And if I wasn't told in advance and discovered it when I arrived, I'd be upset and would leave immediately.
I wouldn't have the party unless I could send our kids to a babysitter.
With all the work - and money - it takes to plan a swinger party, I don't understand why parents couldn't find a babysitter if they put the same effort into that project...but then, I don't have children so maybe I don't know what I'm talking about.
LM