He Made an Exception for Her. I Made Him My Ex

From the back cover

Adrian has one rule: no overnight guests in the home he shares with his wife, Nora. In six years of marriage he has never made an exception, not even when her mother came to Boston for a hospital follow-up and asked to stay a single night. Nora booked her a hotel room instead, and her mother never visited again.

When Nora returns early from a business trip, she finds Adrian cooking for his childhood friend Chloe Whitaker and Chloe's mother Diane, who have been living there for three months. The rule, it turns out, bends for them. Nora leaves her wedding ring on the table and checks into the same hotel down the block where her mother once stayed.

As Adrian sends shopping lists and dismisses her anger, Nora arranges a transfer to Charleston and moves to sell her share of the Rose Room, the restaurant they built together. But at the Rose Room she finds Chloe and Diane's friends celebrating among her roses, her father's wine opened and her cat gone.