Did I really ask my girlfriend to become a slut?

***********

I spanked Jackie harder this time but she continued to giggle.

"It's ok babe, I don't know why but I just can't take you seriously doing this." she said mirthfully.

I looked down at my girlfriend, miffed at first, then I started to laugh with her. We had been together almost a year and we were trying to mix it up. Jackie loved sex and I was always trying to keep up with her. She had told me that she had fantasies about being submissive. We had played with it a little before and on this night we had...