Tantha is the "father"

Both of your companions birth dark-skinned hermaphrodite children, one a half-elf and the other with your eyes. It is an incredible time in your life: all three of you raise your babies.

Noire is still reluctant to lie with futanari women, but returns beneath Tantha to be bred again, reveling in it more than ever: her hips widen and her tits grow as she births many more children for the dusky futazon.

You have many more offspring with Tantha yourself! All of them quickly grow-up healthy, tall and strong, with fairer but still dark skin, and all hermaphrodites like their mother.

When you finally ask Noire about the sex life you all share- she explains she's pretty sure she is and always was straight. However, the sex is great and she really enjoys breeding. Motherhood is a thrill to her; you two don't play much, and you begin to suspect she even prefers futa cock now. She and Tantha often breastfeed each other when lactating, and you get to suck both their pairs of tits too.

As the years go by and you age, you use some knowledge of construction in your world to help the tribe develop masonry and concrete. The tribe's architects, taught by you, actually becone sought-after and well paid! Both your children and apprenticed visit you often when you are elderly, always ready to care for you.

You live a peaceful life full of sex for all your days- all kinds of filthy sex, even when you tire of it- and you raise a loving, moral and educated family despite the bizarre start this all had. Noire's lifespan is longer than both of yours and she leaves the tribe's village decades later, but you and Tantha grow much closer in your middle and aging years.

At the end of it- you and her share a grave after passing naturally, and your many descendents always have flowers at your grave.