hmm on my playthrough there was no forced NTR. The mind-control guy seemed conflicted. Though I did choose options to try to stay friends with him and include him in events. Though his arc/story isnt yet done.
you have to gain as much power as possible. Use full strength when sparring against the dude. Kill the guys at the bar when they were shooting you. You can also get a sex scene from Ella when you choose to fight her after you fully train, use full strength, and kill the guys. Its a dead end but one of the best scenes. With all of this you will be able to stop Jake. If you find anymore strength scenes then reply here