The History of Love--Nicole Krauss

I liked this one, although I kept getting characters mixed up, but I couldn't help thinking about how Krauss is married to Jonathan Safran Foer and how their books had similar themes, and then I wondered about what it would be like for two writers to live together. Do they borrow ideas from each other? Are they secretive with what they are working on? Do they bounce ideas off each other? Do they borrow discarded ideas from one another? I couldn't stop thinking about this, and it kept me from enjoying the book. Weird, I know.