Thanks for all the encouragement! I was really glad that I had the forethought to wash the blankets beforehand. I would have been even more upset if this had happened after they had gotten home!
I'm done repairing the squares with pink centers and the rest of the squares seem secure, but I'm a little hesitant about them. I'll send a repair kit with leftovers of the yarn and a needle with my sister in law, just in case.
I have a few other gifts to make but I won't see those friends until after Christmas, so I'm breathing a little easier right now. I plan to work on projects for me this next week. That's my Christmas gift to me. Knitting time.