Ok, 2 things
1) **** the other guy... No, but seriously, if your going to fool around with his girl at least be respectful (

)and make sure you call him up and tell him what his girl is up to. I know if my girl was doing that i'd like to know. Also, thats what she gets for being a cheating slut. (p.s. - make sure you get ass first)
2) If you wanna get some ass then thats fine, but if you even try to start a relationship with this hoe you should be pimp-slapped. She just cheated on her bf with you, what makes you think she won't cheat on you with somebody else.
Let me re-cap
Ass = good
Relationship = bad