Should it bother me that my MIL didn't give us anything for our wedding?

First off, I didn't expect gifts or cards from everyone. Others didn't give us anything, and that's fine. My MIL didn't help with the cost of the wedding. She's definitely not hard up for money or anything like that. I just felt like it was a little odd for us to not get anything from her, even if it was something inexpensive, sentimental, or even something just for her son. Is it common to not get gifts from parents?
Should it bother me that my MIL didn't give us anything for our wedding?
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