Not sure how to feel about this

Anastasia

My husband and I have been married for 6 months. Every holiday that’s passed since we got married (and before) he will get his mother cards for holidays and birthdays. There’s been a few times where he didn’t even tell me he even got a card and just went ahead and sent the card without my name on it or anything. This time, it’s his moms birthday, and he decided to get separate cards. One from me and one from him. I have to admit, I’m a little offended. I’m a part of the family and I’m HIS family now. I feel like it makes me look bad to her and I feel left out and angry that he wouldn’t even think to include me in something that families do together. It’s also irritating that I feel like we should sign things together. Opinions please.