Ok so my wife's bike came (Motobecane SRAM Rival CX bike) and it's got a double chain ring where mine has a triple. She's not as strong as me (endurance/strength) but she weighs 60lbs less.

So while I have no problem switching drive trains (mine is tiagra/sora) it would mean downgrading her bike. So I'm not sure what to do... she is just getting into cycling and isn't quite as passionate as me but that is subject to change.