cheating

Cheating is when your girlfriend or boyfriend secretly holds hands behind your back, is making out with someone who isn't you, or has sex with someone who isn't you. If they are touching another ones leg and willingly let's the other human touch their leg in a sexual way, they are cheating on you.

Hey, how are you doing bro? "Not good, I found out Natasha was cheating on me"

"Bradley is cheating on me and now I'm having a meltdown"