I think this is a thriller? I'm not entirely sure because this was such a short nothing book and I can't think of anything that happened. The main character has some sort of problem where she becomes obsessed with people and ingratiates herself into their lives. She meets this family and thinks the mother is wonderful and her husband is amazing and the daughter is a light, so she wants to join them.

And you'd think something else would happen, but that's pretty much the whole book. It's boring and it doesn't make sense. There are a few major glaring details that don't add up, no one does any sort of background checks, fertility doctors apparently can't tell if you've given birth before and don't care.

This whole book was so nothing. It's one saving grace was that it was so short and quick I didn't have to spend much time on it.