Pain and Lactation Part 3

Rob is fine with his wife sharing pictures of herself lactating. He gets a thrill out of knowing strangers see her naked on the internet. He doesn't mind that she shares her milk with Jason and Brenda when the two couples get together. What he worries about is how this will ultimately affect his life, his wife, and their marriage.This is a 12, 000 word novella intended for adult audiences. Part three of four.
Content warning: features erotic lactation, graphic sex, BDSM themes, group sex, lesbian sex, strong language, adult nursing relationships, erotic situations not all members of the public will enjoy, and other depictions of adult sexuality. Explicit language and adult only content. Excerpt:Vickie now didn't hear the little squeaks of pain from Brenda's lips as she steadily raised and lowered the crop.
She found the motion and the rhythm enjoyable, accompanied by the music of Brenda's cries. Slowly Brenda's white skin changed from pink to red and Vickie wanted to see if bruises would form as well. It was a completely surprise when Jason grabbed her arm, preventing her from hitting Brenda again. "She good, " he told her. "You can stop."A second later she realized what she had done to her friend. The crop felt foreign in her hand and she gasped, "Did I hurt you?"Brenda looked up at her with sad, but satisfied eyes, "Yes, but I wanted you to, remember?" She carefully climbed off Rob's body."I'm sorry, " Vickie apologized again as Brenda took the crop from her."Don't apologize, " Brenda told her.
"Now take off your shirt and bra."Vickie was afraid for a moment, but saw the red marks all over Brenda's body and found her courage.