The day after

The day after, Shinobu approaches me. "Are you fully satisfied with yesterday?"

I admit that yes, I am.

"So, can I tell him that the invitation is only for last night?"

"Wha?" I ask, not fully understanding what she is trying to say. "But why?"

"I think that Naruto's infatuated with me now,"

"That's not a bad thing, isn't it?"

"Yes, it is."

Shinobu is struggling to put her thoughts into words but I already noticed that you have been behaving different from her other partners. As she had said, it seems that you're going to develop some feelings for her. While I don't say it, I also notice that Shinobu was acting odd as well.

"Anata, this has been the wildest thing we've ever done. However, we should stop it."

"Why?"

Shinobu stops and look down, "Before last night, we're having sex with other people and they were exciting. I enjoy it, and you as well. But last night, it stop being simply fun. It is enjoyable, but yet there's something else. I thought that I understand what is making love is all about, but last night I was proven wrong. Naruto made love to me, and it makes me feel loved."

I stare at her in surprise, not knowing what to say.

She continues, "Women are different than men when it comes to relationships. Before this, I would have confidently say no but now I'm not sure how my feeling will be affected the longer I continue with this affair. Despite what I said to him, I'm not comfortable being his lover, and I'm also not comfortable developing feelings for him despite being your wife. If this goes on... I... may fall in love with him."

That admission hit me like a heavy punch.

In retrospect, I did notice the two of you were caressing each another and kissing passionately while fucking last night; on second thought, the two of you were making love. Only at that realization that I feel a twinge of jealousy at the thought of you being more intimate with Shinobu. However, at the same time, my rock hard penis was proof that I also find it exciting.

What should I do? Do I tell Shinobu to stop or do I coax her to continue exploring with you?