He’s really doing this again ..

my boyfriend & I are engaged. we are 23 & 24.. & he’s done this for awhile & it pisses me off.. but he said he’ll stop.. then does it again.. he gives money to his mom alll the time .. don’t get my wrong, I wouldn’t mind.. IF SHE WAS STRUGGLING.. but she’s not.. she asks him for money on top of asking one of her 3 boyfriends for money so she can get more money.. she lives in a house paid for by one of her boyfriends & has two other ones that she asks for money from.. she literally has 3k sitting in stocks.. & drives a new 2022 car, paid for by her boyfriend & then her boyfriend also just bought her the new iPhone 13 pro max yesterday.. she calls my fiancé yesterday(knowing it the day before payday) & asks him for $50.. (mind you we are struggling, have been).. & he said I’ll let you know .. she said my account is under .. I really need it.. but we have rent to pay this week, a $300 car insurance payment & have to get our dogs fixed .. & she tells him to send it to his sister .. so she doesn’t even need the money I’m pretty sure .. she just knows that he won’t say no to her .. it just pisses me off.. because now we can’t pay our RENT & have to be late because he just gave her money..