Use "Confusion" and "Suppression" during the 2nd conversation, or "Grapple" when she is crying.
To achieve the "Hentai Ending," you must complete the Time Machine quest by visiting Ami’s house every Sunday for seven weeks and providing specific items: : 20 Coffee cans (-$200) Week 2 : 20 Handkerchiefs (-$400) Week 3 : 20 Flowers (-$1000) Week 4 : 10 Medicines (-$800) Week 5 : 5 Diamond rings (-$5000) Week 6 : 10 Teddy bears (-$3000) Week 7 : Final completion and scene unlock. Quick Pro-Tips simgirls 66 guide
Cast "Confusion" and "Suppression" or use the "Grapple" ability. simgirls 66 guide