Thankfully, my brother and sister and I have agreed not to buy Christmas gifts for each other - just for the kids. We have gotten lucky there as we only have 3 nephews to buy for while my brother has FIVE nieces and nephews to buy for.
But, really, my sister-in-law didn't need to give me the gift she gave me. Really. She should take it back. That is, that cold that she was suffering from for two weeks when she visited for Christmas. I think she shared it with me! Really, I appreciate the generosity, but that's really alright.