Meh, if he has money and she's good looking ( like you of course ) he has mentioned by now something about a trip for New Years to Cancun, Caymans, etc. and she's thinking she wants to go "as friends".....
Tell her to STFU and FO! and if she brings that shit up to you again your gonna bitch slap her like the bitch she is. That aughta work, one way or the other...