"Uh, listen, miss...," you say, backing away slowly.
"Call me Mei," says the shopkeeper, stepping out from around the counter. As she does, you can she takes her hand off of Kira, but it doesn't seem to stop her from feeling horny. As she comes closer, she instinctively removes her shirt, driven by her lust.
"Listen, Mei," you answer, trying desperately to reason with her, "we... we shouldn't do this. I... I have a girlfriend..." You've been through this emotional rollercoaster once already with Kira. You really don't want to be in a position of cheating on Brooke again.
Mei grins mischievously. "I don't think she'll mind." She edges closer to you, slides her hand down your pants, and gently grabs your penis. "Oooh. You're not wearing underwear. How daring!"
"What... what's going on?" you hear Brooke ask, followed by a loud moan as Mei starts fondling your manhood. "Mmm... ooh, that feels gooood. Brooke like. Me want more..."
"Brooke! Don't YOU start now!" you yelp. "Fight it, honey! For the love of God, fight it!"
But your entreaty is ineffective-- Mei unbuttons and unzips your fly, and suddenly Brooke is exposed. She is elated to be free from your shorts, and the feeling is beginning to have an effect on you, too. Maybe... maybe this isn't so bad after all...
"My, what a big strong manhood you have," says Mei, reaching down to give it a kiss. "Don't worry, I'll make sure she has a good time." Completely uninhibited, Mei sits on the countertop and slips her own skirt and panties down, spreading her legs and giving you a glorious view of her smooth, tan pussy. "Come on, honey. Don't make me wait. This will be fun. I know all sorts of magic spells to enhance our pleasure... Come over here and give me a good fucking."
"Mmm," moans Brooke. "Me cock... want fuck! Need pussy!"
The pull of your libido combined with Brooke's is too powerful to resist. Her mind has slipped away again, and your fidelity to her is slipping, too. Just as you experienced with Kira, you find yourself drawn irresistibly to Mei. She turns over, showing you her beautiful tight round bare ass, and bends over the counter to give you easier access to her waiting slit. Unable to stop yourself, you come up behind her, penetrating her most intimate of areas, and begin grinding. Brooke is absolutely wild with lust. There is no going back now.
"Oh, yes!" screams Mei. "More! Harder!" You increase the pace of your thrusting, until Mei says, "Mmmm... oh, wait! I've got a spell that will make this even better!"
Experimentation with the rings aside, you've never had sex with somebody with actual magic powers before. Things just got interesting.