Erin Brady has been dating Steven Tyler for seven years, show she's got a lot of time invested in this relationship.
With that being said, she is not having it if Steven decides to lay with another woman.
"I just said, 'Hey listen, if you play, I'm gonna play.' He didn't really like it when he was on the other side of that scenario
Steven told Oprah during her last show that he regretted cheating on his two ex wives.
But he also admitted he wanted to do the nasty with every girl he sees!
In his words:
"I'd like to go on a schtupping spree and screw every girl I see, that would want to have me, who wouldn't? But I don't. I want (Erin) for my own, and if that's gonna take that away from it, I don't do it.
We'll see how long this relationship lasts.