Am I overreacting ?

Me and my boyfriend have been together for almost 3 years and I've never really had a very close relationship with his mom or anything (she was in his life but lived in another state and he was raised by his dad and step mom ) but now she moved out here . Anytime we go visit her she's very friendly and everything but she sometimes makes rude comments at me and they make me uncomfortable. She mostly does it when I'm sitting next to her and my boyfriend isn't paying attention . Like I said something yesterday about a game we played and she goes "obviously it didn't say that " because I said the rules didn't state something . She makes me feel bad about myself and kind of stupid . We were playing a guessing game also and she goes "nicole just take your wine and keep drinking " . I thought I was doing very good at the game but I guess I was just making a full of myself . I'm already quiet and shy so I don't know why I'm being picked on