<human>: ~posted from mobile~

I [24M] recently moved into a house with 3 friends [24/24/26,M] I met in college (all three of them went to the same high school ). Being four 20-somethings, we regularly throw parties at our house. We live near their high school and they regularly invite many of their high school friends to said parties.

One couple from these high school friends, Dustin and Alli [24,M/F], is usually invited, but they always bring their 3yo daughter, Kate, along with them. This is weird for me on its own, but if the parent were moderately responsible I could see myself not worrying as much about it.

The problem is, Dustin and Alli are not responsible parents. As soon as they walk in the house Kate is left to her own devices, while the two of them proceed to get drunk and high. They've twice had to stay the night (with their daughter!) because they were unable to make it home safely.

Kate is a precocious little girl, and we've caught her stealing/destroying things, as well as antagonizing my dog. He is also still a puppy and significantly bigger than her, so I either have to lock him up (which is unfair to him because he's very chill with all the adults), or I can't relax knowing she might provoke something. 

I have previously brought up how uncomfortable this makes me with my roommates, but they don't seem to mind.

We're having another party this weekend and I've decided I'm not ok with this happening anymore. Since they are not my friends directly and are much closer with my roommates, should I give my roommates the opportunity to talk to Dustin and Alli first, or should I just let them know they can only come if their daughter is not with them?

Provide a brief overview of the text.
<bot>: Roommates' friends always bring their small child to parties at our house. Best way for me to let them know that can't happen anymore.