Tolerant Wives. Evolution of a Woman, #4

Charley married a rich woman that had a low sex drive; she encouraged him to marry other women.  He got wife creep since he got more wives than he needed.  The problem was he was better at attracting them and keeping them than he was at losing them.  He had a few potential divorces but none worked out.  The best part of having a lot of wives was he had numerous sexual partners who were eager to have sex.  Not all of his wives liked a lot of sex though.  That didn't bother him since he had plenty of willing wives.  He had a housing complex in town where his wives could live.  He had a ranch that had plenty of houses so they could live out there too.
His engineer wives built a survivor shelter so his family could survive a catastrophic event.  Charley didn't think they would ever need it, but a large meteor came in so his family retreaded to the Shelter.  This novel has lots of twists and turns. There are some explicit sexual scenes.  It is Novel 4 of Evolution of a Woman.