I do not see twins as hopeful. Higher feeding and raising burden on a mother, and genetic narrowing. Age separated sisters would permit future auntie-rearing, sharing of the roles.
There's always a risk of infant mortality. I don't want to feed a doomscroll, a primate birth is a wonderful thing. Saw a neonate chimp in a zoo 5 decades or more ago, very affecting. Proud mum!
