If I was a kid, I wouldn't want to go see this with my mother.
Any movie that was questionable or required adult supervision I would feel uncomfortable sitting there with my parent. Thats just sucks. I'd just buy a ticket for another movie and sneak in to see that one, thats what we did when we were kids.
Drive him there, tell him how to scam his way into the movie and pick him up afterwards. Have him bring some friends along. You will be the coolest mom ever.
-Smoke lots of weed with your child and his friends
-When they throw a party in high school, toss some beers and condoms in the room and leave
-Sleep with at least one of your son's best friends
-Walk around in your panties whenever his friends are over. Top optional.
-Let him go see 8 Mile without tagging along.