I was spanked by my ex-mistress´ mother in law.
Long story short, we were in a cuckolding relationship, and she wanted to prove her I wasn´t really an alpha, which she knew because I met her before in the BDSM community, where she is a gorgeous dominatrix milf and I´m switch. She sometimes spanked her daughter in law fully naked in front of her husband.
She was disgusted about her son being a so submissive cuckold (I banned him from penetrate her, and he was willing to let me knock her up), so she cited me to her apartment one night, with the excuse of discussing the matter, among my lover and her hubby. When I came, she ordered me to get fully undressed and lean over her lap, which I submissively did. She spanked me with a wooden palette in front of them, and make me count every stroke. They were 50. I was aroused the whole time. Then she had my lover getting undressed and being spanked 50 times, too. She then told her son she didn´t want to be interrupted, and dragged me and my lover to her bedroom, where she fucked me savagely and in a very dominant manner, in front of her daughter in law.
On a pillow talk she confessed it was all a scheme to have me out of the picture, which resulted, since my lover ended up dumping me that very same night, for my domina´s delight. I felt embarassed and humilliated, but, at the same time, aroused by the control she had over me. I kept being her slutboy some time after this incident.
