Maybe it's a fad that he's going through. Tell her to let him be, I'm sure after a while, when he feels the need so to speak, that he'll suddenly take an interest again. If I were her, I'd start do things diferently, like going more to the gym, or treating myself to the hairdressers or a facial every now and then to make me feel good, sort of making a diference without it being obvious. Then he'll see what he's missing, so when he gets in the mood again, she should turn him down! That'll teach him.