It's cuz her dad is a beta
her dad is a beta
His dad (brown hair) is a beta, and in this work’s version of the omegaverse, betas are biologically incapable of getting omegas pregnant. They used an alpha sperm donor so Bin is pretty much a carbon copy of her mother.
I think it's because one is an omega male and the other is a beta male so they need a sperm donor to be able to have a baby.
Because her daddy is a beta and her momma is an omega
Thank you all, I thought beta could make omega pregnant
I don't follow bin's parents' side story, why did they have to sperm donor??