Would this upset you?

Hello ladies so im really frustuated because a week ago my husband's cousin planned to go fishing well i guess none of his friends wanted to go so he cancelled it, so i get a call a week after from my cousin she and her husband want to visit us and i let my husband know and he said sounds great we can do something fun and since we live an hour away from my family he knows how important it is for me to see them. So now this morning his cousin calls and says " hey plans back on with fishing we're coming over to your house we can drink and then go fish for sure saturday" then he hung up So i told my husband hey we already have my family coming over you should let him know we can't have HIS friends just show up at OUR house because we already have plans. My husband then says well your cousin is coming to see you soOo i don't have to be here. Now whats making me upset is we both agreed on being with my family now all of a suddem his cousin self invites himself and HIS friends to OUR house without permission? Im going to be hosting for my own family not a bunch of random guys and second my husbands plans were cancelled a long time ago now he wants to ditch mine. This isn't the first time his cousin just barges in pushing his own plans to our place when he has his own apartment, but not just that i feel like its so unfair whenever my husbands family has something i always have to be there and if something pops up well i cant because im with his family. Now new years eve again his cousin wants us to host i had no problem but now i just even want to cancel that . I know im being over dramatic im just so upset this always happens.