I don't have any problems with good sex or even making love, but when my wife is into it one day, and then the next day says she only did it cuz she was lonely, scared, remorseful, comforted, then it gets really confusing and sticky.
Don't take what she says too seriously. the point is she wants sex, and she wants it with you. Sex with you calms whatever is bothering her. Isn't that a good thing? I could say I only ate the cheesecake because I was bored and depressed. But truthfully, I ate the cheesecake because it was sinfully delicious!