The Qaraq (1001, The Reincarnation Chronicles Book 1) by Stephen Weinstock

Sahara Fleming experiences disturbing visions: reincarnation stories as a Red Isle goddess or in a 4th Century Persian orgy. Sahara dismisses these time travel fantasies as stress. She’s four months pregnant and married to Amar, an emotionally aggressive stockbroker unwilling to be a father.

When a mysterious circle of neighbors plants clues about her visions, Sahara learns they are a qaraq, a group of intertwined souls who come together lifetime after lifetime. At secretive meetings, Sahara hears tales of magic realism and realizes her stormy marriage goes back centuries.