Am I wrong or over reacting? A bit long

Soo today as u kno was Fathers Day. Me and my best friend (who is my fiancé cousin) Planed a small Family bbq. Jus us our children and my fiancé brother his wife. U kno the most inner circle of fam. Soo my SO had been drinking for most of the day I’m 4 months pregnant so no drinks for me. I go outside to bring him a plate of food and he is like oh I’m giving a couple ppl our address and I’m like uhh no ur not. It’s a family thing only. (Mine u I’m thinking he is tryin to invite all the fellas) so I go bak inside. Like an hr later on three year old come in and say mommy daddy is thirsty so I head out to bring him a bottle of water and as I walk up I stop next to his cousin (my bestie) who has I turned up look on her face as doesn’t his mother and sister in-law. Some strange women walking up to our home. My Fiancé introduces her we are all like who is this he is like oh an old high school friend(they use to date) I’m like umm ok wtf y is she here. I said hello and immediately pulled him in the house and snapped on him I’m like wtf she needs to leave Now. How cud u not ask me if some random ass women cud come to our house! I wud never then she is married but didn’t bring her husband or kids like wtf! She lives in NC and is here visiting fam but I’m like are u fucking kidding me! If I pulled something like that he wud of fought the guy! I told him yo tell her to go and he did. He apologized but I don’t think he gets how I’m feeling about it. Like I feel like he wanted another woman’s attention or something like I don’t understand wht made him think this was ok! I’m still soo pissed about it I’m like how did u even get to the point of inviting her! He won’t answer jus says he wasn’t thinking like wtf does that even mean!im currently on my couch bc he is passed out in our bed . Am I over reacting. My gfs said I’m not and they totally get it! Jus wondering wht I ladies think?