The young are collected by those assigned this task, and raised essentially in orphanages. She in fact receives more support than she could ever use, an abundance. The issues revolve, instead, around the child. Who would provide the best genes, the most sustaining parental attention, and the most stimulating environment. As for sex, this is freed from the near automatic connection to procreation that occurs in 3rd Density.
Contraception is assumed, as is free love.
One should not assume this means promiscuity, as there is less of this than in 3rd Density human societies today. Ownership and possession are not part of the equation, at least in theory.