Charlize Theron, Sean Penn Underwood Family Farm son Jackson Charlize Theron, Sean Penn Underwood Family Farm son Jackson

On Sunday Charlize Theron and Sean Penn took her son Jackson to Underwood Family Farm in Moorpark, and in between going on rides and petting farm animals, the two snuck in a few kisses and couldn't keep their hands off of each other!

It's not like they were acting that inappropriately around the other families there, but from the booty grabbing to going after Charlize's neck like a vampire, Sean was acting like like a randy teenage boy. It's hard to believe that for a while we were all fooled into thinking that they might be "just friends"!

Just as long as Sean knows that this guy is Charlize's number one man:

Charlize Theron, Sean Penn Underwood Family Farm son Jackson