I know, I know this has been asked a million times, but I lack effort right now to try and search for the posts where this has been discussed.
FI asked me if I was 100% positive that we don't need to get our parents a gift. They paid for the majority of the wedding and I have plans to get both sets of parents a photo book with wedding pictures. That probably won't happen until around Christmas time. I of course was going to get both of them a nice card to express how thankful we are to have had help from them. Is that sufficient enough? We would obviously write in the card that we plan on getting them the photo books, but I just want to be reassured that our parents are not going to be upset that they don't get anything.