My wife slaps my bottom to motivate me

It's definitely not normal, but you're a very lucky man!

That's actually pretty awesome, lol. :)

Wonderful.

My wife was always threatening to spank me as an adult. I was beginning to get turned on wondering if she would actually do it. When I turned 30 she asked me what I wanted for my birthday and I told her I wanted one of her hot sucks and a birthday spanking. She didn’t even flinch and told me as soon as I got out of the shower after work she would give me my wish. Meeting me naked right out of the shower she pushed me on the bed and started sucking my cock. sucking me until I was about to come she spit out my cock and masturbated me into the palm of her hand collecting all of my semen. ordering me to roll over she massaged my come into my bare cheeks and started slapping it off as hard as she could. I really got one hell of a birthday spanking and it was definitely more than 30 whacks. When she finally finished I was still writhing on the bed bouncing up and down as if I was still getting swatted. That was the first of many spankings from then on.

Normal to have this fantasy. And fairly common for a couple to live it out. But including your sister-in-law in real life and not fantasy is not unusual. But, if its true good for you. I doubt it is because you would probably not be posting here asking that question. For someone to live out this fantasy they will have put more thought into and know how "normal" it is.

If it's consensual have fun

Enjoy it man, add slaps feel good, I'm glad my boyfriend is a spanker that is for certain