I’m 25F and engaged to my amazing fiancé 27M we’ve been together for 3 years and just got engaged 6 months ago everything has been great... until his mom started acting like she was the bride

She’s been calling my wedding her “dream come true” she picked a dress that looks suspiciously bridal she tried to book the same venue she had for her wedding and even referred to my fiancé as “my little groom” in front of everyone

I brushed a lot off for the sake of peace but it got weird fast like she said she wanted a “first dance” with him at the reception — just the two of them and I was like uhhh no ma’am

But here’s the kicker — we were at a family dinner and she said to me with this sweet little fake smile “you know I’ll always be the woman he loved first and most right”

And I just snapped I said “Well that might be true but I’m the woman he chose to spend his life with so maybe respect that” the room went dead silent she looked like I slapped her and my fiancé’s family hasn’t stopped texting me since saying I humiliated her

My fiancé is on my side but now there’s talk about me “damaging the family” and being disrespectful

AITAH for drawing a line and putting her in her place or should I have just smiled and swallowed it like always