sex after baby...

Hi people..... I can't comment here...so asking you to share your personal experiences, and/or advice. As she's not one to talk about 'sex' stuff with other 'mum friends', my best friend has a little boy who is now 9 months old, and her sex life has diminished since she fell pregnant. She wants to know.....has this happened to anyone else??? Her partner has not been interested in sex since she started 'showing', and has even told her he does not find her as attractive anymore, and it's just 'human nauture'. She is an attractive girl, she put on a bit of baby weight, although is still 'turning heads'!? She thought it would get better....9 months on she is craving SEX! They have talked about it, and he said "nothing is up" ...although it's just not happening. She is always up for it..although is now even getting turned down. Hello...do men turn down sex??? .......not that I've ever heard of??? Any suggestions? or similar stories...