I guess the egg cell you came from was made inside your grandma when your mom was an embryo in her. So the the cell was technically made inside your grandma’s body.
So technically I don't think we can say the grandma is making the eggs directly, but has assisted in the fetus' creation, and then provided the nutrients/environment for the egg creation that the fetus itself makes (which yes, can influence things w/ the generational trauma science coming out...).
this passes on the structural features responsible for regulatory configuration