Of course

You walk to a nearby park. There are a few people walking or jogging along the perimeter, but not a lot of people in the park itself. In a grassy area, you spot a woman meditating.

There is no one nearby. You get up close enough to use the ruby stone to freeze her. You then use the sapphire stone on her. "This woman is in deep trance. She will not wake from it no matter what I do to her or with her."

You unfreez her. You walk up to her and test her by patting her on the head. She does not wake from her trance. You then kneel behind her and reach around and cop a feel of her breasts, but she stays in her trance.

Growing bolder, you stand up and lower your pants. You take your cock and stick it in her hair bun. You then start fucking her bun. You look around and don't see anyone looking you way, but the jogging track is probably too far off for you to use the gems on anyone using it, so you don't want to be seen or worse yet, filmed. You keep fucking the woman's bun, messing it up and pulling strands loose, until you shoot a big load of cum into it. When you finish you pull out, zip up, and use the sapphire stone again: "This woman will wake from her trance in one minute. She will not realize her bun is messed up or that there is cum in it until she gets home. Once she realizes there is cum in her hair, she will know someone fucked her bun while she was in a trance, and the idea of someone fucking her bun really turns her on, and is her new fetish."

You walk off, whistling as you go.