Ninety-Nine Nights is single player. Microsoft was supposed to "add" multiplayer through XBL, but that's a no. Hah. Anyway.
If you're trying to get her into games that are fairly simple, for one - don't insult her intelligence. For two, give her a range of games for her to figure out what SHE likes. God forbid your bias prevents her from ever wanting to play games with you again.
I've noticed you ask a lot of questions as if you've never researched it. Research~