bf wants me to fuck a girl

Never tried threesome but my bf said this is his fantasy and wanted to see me get fucked by a girl. Idk what to feel, gusto niya lang daw manood and he would fuck me after and never niya raw gagalawin yung isang girl. He just wants to watch na kinakain ako, scissors and me sucking a woman’s boobs.

Thoughts on this? When I asked if he would do a couple switch ayaw niya cause there’s another guy that could fuck me. Lol.

It seems impossible to me na kaming dalawa lang nung babae mag ffuck at manonood lang siya