Ahnasha would likely tell Fendros that they could hold a small ceremony in Cheydinhal, or just outside of it. Perhaps find someone willing to perform Dunmer ceremonies between him and a Khajiit. Though, she may or may not have ulterior motives to try and get him to meet with the rest of the family. 

I think Peiter and Sabine might start to see more of each others' flaws as things settle down. Peiter's mental state won't be as much of a factor, but he isn't always going to be so over-the-top affectionate as he was when things were fresh. If they are separated for a period of a few months, he might not want it to continue either. Being a part of Meesei's pack would take Sabine away from the clan rather frequently.