Okay so please tell me if I'm overreacting. My ex boyfriends mom posted her own gender reveal for my…

Okay so please tell me if I'm overreacting. My ex boyfriends mom posted her own gender reveal for my babygirl on her snapchat before I even posted mine and without my permission too. Even though it was just family would you be pissed too? Also she hates me I feel like she did it on purpose to hurt me. I asked my ex to have her take it down and they're acting like I'm throwing a big fit for no reason. Also his sister ruined my sons gender reaveal last pregnancy 😒😒😒