On the scope of available females she just became about as useful to you as your sister. Unless you want to fuck your sister. But if your the kind of person who wants to fuck your sister you probably would fuck your friends girl too.
Anyways this shouldn't become confused with homie hoppers. A girl can only be one of these at a time. Most homie hoppers start as a girlfriend in law but can transform into a homie hopper. But they can NEVER be both at the same time...JH
Me: Bitch I don't cerrr'. I dont wanna be your buddy just cause you fuckin my friend. Quit trying to waste ma damn time ho.
Girl: okay see ya around tee hee (starts skipping away) tralala lala lala
Bitch faced Mitch: Yo, you hittin that?
Me: Nah my homeboy is. She's just my girlfriend in law.
Bitch faced Mitch: word, well that sucks
Me: I'm off downtown to see my girlfriend in law. I promised I'd take her out for a beer and then maybe some cuddling on the beach at night.
Friend: Haha good times but, you guys are just kidding yourselves. Get together and be done with it.
Me: Dude you know she has a boyfriend.
It's cool -- Brit's my girlfriend-in-law -- that gives me special privileges!
If you can convince Lilo of that, you are my new god!