These photos make us feel uncomfortable ... Maybe Tina Simpson should put down the adult beverages so she can stop clawing at her daughters' husbands?!

Tina got more than a little handsy with both Eric Johnson and Evan Ross during a birthday vacation to Mexico -- and by more than handsy we mean put Eric's head into her crotch. Huh?!

Along with the creepy close party snap, Tina simply wrote, "Son in law." We think a more apt caption would have been, "Cougar."

We know they are in Mexico but maybe the group should lay off the margaritas and drink some agua.

The birthday girl, who just turned 56, also posted a Polaroid in which she's getting cozy with Ashlee's hubby with the caption, "Blessed by the 2 best son in laws!!!"

We also think it's a bit odd that Ashlee and Jessica's mom didn't post photos of her daughters -- only their hot hubbies. Is that telling? We think so!

With photos like this -- it's no wonder that Jessica seems out of it all the time. Maybe the two are partying together?!