Muy hermosa y caliente
You know, it doesn't really bother me that much that her weight gain concerns you. I'd be concerned if someone suddenly started gaining weight because it can be a sign of certain things, though you really don't mention much about her health. What concerns me is that you are too ashamed to bring her around your family and friends. That's awful and DOES make you a bad person.
Amazing Tits! Those are nice!