How would i introduce them to my parents??

I'm 18 and in a relationship with my two boyfriends (poly~) and we all recently decided to live together. We're all moved in but my parents said they want to come over for dinner or invite me over to spend time with me but they don't know about my boyfriends. My boyfriends parents dont know either ( all of us are asian, im mixed ,so we probably all have the fear of getting beat with slippers and other household objects lol)

and idk how I'd tell my mom... especially because she's probably gonna say " Is this some excuse to have threesomes??"

or something like " Lala i want grandchildren. You can't give me grandchildren with two dads" and other stuff and idk what to tell them... any suggestions??