I did when I lived with someone. She talked me into joining bally's, yes I belong, but I don't train there anymore, although there is some nice pieces of ass, so I may pay it a visit. Anyway, she trained with me for 3 months. I workout at 6:30 a.m., non-negotiable, or so I told her. It turned into fkn 7:30 after two days, lazy bitch. It was a new gym to me so I didn't run into any regular bitches to piss her off, which would happen at my gym and I really didn't care about dudes chatting her up a bit when I walked away, cuz I am like realy fkn good looking and that shit doesn't bother me.
But I could see that being a problem for some peeps, who knows. So after 3 months of lackluster training, I looked exactly the same, which was fine, and she lost about 15 pounds and looked good for 3 months till she got pasty and chubby(135 pounds at 5'7" is chubby to me) again. So, unless she is as dedicated as you, then I fail to see the point. Send the bitch to Curves, or better yet to the grocery store and the mall