Guys, My husband doesn't introduce me as his wife?

We got married 1 month ago. Today we went to my husband's tournament, he was standing with a woman (40+) he's been knowing for a long time as she would always run tournaments. When i saw them, my husband went"Oh, by the way, it's Kaija." NOT A WORD about us being related.
I feel like he is ashamed of me? Like, maybe if he had somebody hotter he would introduce me to everybody. I don't know. Or he doesn't want to say he is married cause we are both 19 and he is afraid of judgement. It happened before at social events, but when we are together he behaves differently and pays attention to me. I would appreciate honesty from you guys, what you think.
Guys, My husband doesn't introduce me as his wife?
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