Overbearing mother in law

Sooo.. I sent my MIL a pic of our ultrasound earlier and she replied "Omg I'm so happy for us!!!!" Last time I checked.. This isn't her baby. She literally said "us" as if this is her baby. She has been to our house once. She acts like she is so involved but she has literally came to our house one time for about 15 minutes. I am so worked up over it and my husband doesn't really say anything when I try to talk to him about it, but she is driving me insane and pushing me away. Her saying "omg I'm so happy for us" just pisses me off. She also got pissed this past weekend bc I rode in a boat. The waves were not choppy, I didn't ski or ride the tube. I simply rode in the boat, and she got mad. THEN she kept showing me flower girl dresses as if she is trying to get me to change my mind about which dress to let my flower girls wear after I already chose the dress two months ago. Is this not just pure disrespect??