Well, who says she's looking to settle down? Maybe she just wants some fun too, she's quite young and she's only going to be young once, there's plenty of time for that boring settling-down crap later in life .
Are you a slut, BC? No. Personally I don't understand why it would matter, but I do know that to some people peer-enforcement is important (hell, even I do it sometimes too).
I have had this discussion with my brofriends on numerous occasions because as someone who has a vagina and yet is still one-of-the-boys, I get some pretty awesome insider opinions and information from time to time. I don't get any female insider info however as I don't have female friends and at 24 years of age how women work is still a mystery to me. It surprised me that most of all of the guys I ask that weren't raised up uber-religious or by hicks had the same thing to say about sluttiness as I: "If you're sexin' someone for affection, the sheer pleasure of it, the feeling of connection, or to enjoy both of your bodies, than it is not slutty; however, if you are sleeping with someone sheerly due to their status, a possible boost in your status, money, drugs, nice dresses, attention and not affection, to get back at someone else, or a promotion, then you are indeed a golddigging whorish slut of the worst kind and are an abomination to the sanctity and awesomeness of fuckin'."
And there you have it. IMO one girl getting fucked by her boss for a potential promotion is tenfold nastier and more dishonorable persay than one girl getting fucked by 8 guys all in a train sheerly because she enjoys the pleasure and appreciates that much dick.
PS: Also, upon reading other members' posts I realize, and I'm not sure how I didn't before, that this guy is definately dating that girl. When someone says "potential" girlfriend/boyfriend, you know that they're full blown with the person and just don't want to tell you. You don't usually "potentially" date someone, you go after it or don't. So of course don't ever expect anything serious from him, I'm sure you caught the drift of that from other posts, but also...are you comfortable with the fact that you're the other woman? Would you appreciate if someone were going to do the same to you? Something that can rest heavy on your conscious and make you feel low-down and guilty in the long-run knowing you willingly helped someone cheat on their SO, definately something to think about because many people aren't comfortable with that idea.