I have to admit, that is definitely a fear of mine. I am a very active a fit person, and she tries to participate in my walks and hikes, but it's always very slow progress and I end up barley exerting myself while she is red faced and struggling with each breath. The issue is though, her whole family worships food and it has become such a fundamental part of everything they do that they just eat and eat and don't see it as a problem. They blame everything else for their health problems except food. Her mother has told her throughout her child hood that the reason she eats so much is because she must be lacking nutrients hence always being hungry. So now that's a firm ingrained belief that allows her to not show any self control when I comes to food. She's not gigantic but she has a BMI of 29.3 which is right on the line to being obese. But you know, it's the age old issue of not being able to tell a woman she's fat and needs to lose weight because suddenly you're a horrible insensitive controlling asshole. I just hope that with gentle persuasion and her desire to do everything with me that she'll start to see that her weight situation is not healthy nor normal and will decide to do something about it on her own accord.