My wife plays games when she hears a familiar tune or sees me having fun and realizes she wants to play, but doesn't generally pick it up herself.
My lady is quite the same way. She doesn't want anything to do with my games until she sees me having fun with a game that isn't a shoot em up (as those drive her CRAZY), and then she'll proceed to steal my controller & ruin my progress. I really don't mind, though; I'm just elated that ANYONE would voluntarily pick up some of these games, other than me, as I constantly feel special-Ed talking about nothing but retro games to friends & getting glazed "y u no destiny/call of duty/GTA?" looks.