OP here. My wedding was 3 weeks ago. Thanks for your kind comments, but no my mom wasn't drunk (she never drinks). I had a long conversation with her and my dad. Turns out she couldn't keep it to herself any longer. I'm no longer mad at her since she told me the whole story. Both my parents always told me a lot about their deceased best friend whom I'm named after. I'm actually that friend's daughter and my family took me in when both my biological parents died in a car accident when I was 3 months old. In a way, I know my biological parents through the memories of my adoptive parents. I've never suspected a thing since I have two little brothers and I kind of look like my mom. Telling me and everyone I love at my wedding was a way for her to honor her dear friend and 'share' that special moment in my life with her.