Jill travels to the future as Bella, in there she contacts Sage who infiltrates the HOTs to try and found out how she'll destroy the world. She learns of a serum to create supersoldiers, but Quinn lacks an ingredient, MC's genetic material. Sage tries to get it while at the same time trying to save Maya, who is the other part of the puzzle. She's MC from another dimension, sent to this one as a baby to try and save all the timelines. With MCs cum and Mayas pussy juice they both can turn into supersoldiers and save the universe by destroying Quinn. Who in reality is a xenomorph, an alien Queen (Quinn), who uses the HOTs as a way of infecting human males.
There. Makes complete sense.