GGB, She did not elaborate much on it cause my eyes accidentally flew wide open when she said that, I was so taken aback. I have been married to my H for 9 years and there has never been one time that he nauseated me. Sure I've felt rage towards him or not been attracted to him but never nausea. She did then go into a time this past week when he came home and was telling her a story and was not his usual self. He was really being animated and funny and putting his whole self into this story. She said, He looked SO desirable to me at that moment!
So there is a huge portion of truth to what Corri and MrsNOP say about letting your spouse see the innermost you can have the result that you suddenly look desirable to them.
I don't think that SIL understands, though, that it is SO hard to show that side of yourself when you are getting rejected 99% of the time. Or when showing that side of yourself does not net any real results. It all starts to seem futile. I would never say that to her and just showed as much compassion as I could, with absolutely no judgement call showing on my face or voice.
I just showed approval at her "desirable" story and hoped that she will look for more moments like this, instead of focusing on the nausea.