The past 2 years my husband's ex-wife has spent Thanksgiving with us and I was ok with it.  It was actually my idea. Last year, she was recovering from a mastectomy and I offered to take her for her surgery and for her to conveless at our place as she was alone, no family, no friends and my SD was away at college.   But it occurred to me while she was here for the extended period that she was still interested in my husband.  She isn't very forward so the hints were subtle, but were there.  She is Japanese and let's just say being reserved is an inherent character trait.