You may be the first person to ever accuse me of being "rational!" lol
Actually, I've got a friend who is having some serious trouble in her marriage, and it's because of her. She's decided that she's a lesbian. In fact, she had an affair with a woman last year. However, she is trying to work things out with her husband (who has been unhappy in the marriage for a number of years for other, unrelated reasons). They have a 4 year old daughter, and have decided that they WILL put their personal feelings and troubles aside for the sake of their daughter, and will do everything they can to hold the marriage together, at least until the little girl is old enough so that a divorce will not do too much harm to her. They do still love each other, but have grown apart, but are trying hard to make things for for the next 10 to 15 years for the little girl's sake.
Mark