A book from the 1980s, where the wife of a married couple wants a separation and the interesting people around them. The husband's first wife comes back into the picture and she is having troubles with her latest marriage, she meets the 2nd & current wife & moves in for a while. Wife & 1st wife click in a way & current wife asks husband to move out. Book kind of dances around issue of what is going on but sure seems like a lesbian relationship bloomed. Book from point of view of husband and he has his dates too. This is prior to Aids so relationships a lot different it seems, mostly hinted at casual sex and lots of it going on. Eventually husband wife seem to get together again at end, first wife moves on to a different previous boyfriend or husband.
An okay read, kind of interesting because it hints at just how different a time it was.
I have posted it on PBS, it is the only copy so I would expect it to move at some point.