Hmmm, an idea for the ending... you can make the futas argue/fight for mc like how he's important to them (as a person in their life). The mc sleeps with them both separately (male x futa and futa x male). Then the futas talk, make up with each other by getting drunk. One thing leds to another and they say how they feel about each other and then segs happens, but the mc will catch them in the act. Drama will happen, many bad words spoken, regret, tears, ww3 (just kidding), but after that, a hot threesome will bring them all together. After that what bro above me saying about them getting pregnant
.
Something like that. (I'm bad at making stories so pls no bad judgement
)