My MOTHER comes to visit me every yr along with my aunts and we always have a blast.. but my Mom behaves?

but my Mom behaves like she's in her 40s or 50s instead of mid 60s and wants to party with all of my friends the entire time ! Not that having some drinkin' fun is all bad, I mean, I'm guilty for throwing in with it for all of these yearly visits...... but we're not in our 20s and 30s anymore and her antics have actually had an effect on the normal duration of their trip as my aunts don't want to stay as long bcuz of how my Mom acts when she's out here ! I'm already having anxiety attacks about it and they haven't even arrived for their visit this year yet ! What should I say to my Mom or should I say anything ? In the past when I've approached the subject she gets all defensive and pulls the 'well I just wont' say ANYthing' card and pouts.