Fast forward several years, now. Gina completed High School, went on to college to study art, and is nearing completion of her degree. The dynamics of our family have grown and expanded over time. Gina gained confidence and, of course, intense pleasure from her new role in the family, but her focus and direction were somewhat different from her mothers.
Mary's primary preferences were emotionally humiliating me, semi-feminizing me, and enjoying a plethora of large, young, virile cocks to suck and fuck and play with, finishing with me to orally clean her and her lovers when they were done. Gina also enjoyed this, although she did not often bring a boyfriend home to participate, like her mother did.
She did, however, lean much more to the bisexual side than Mary, gaining intense pleasure from showing off to her girlfriends her increasing confidence and ability to dominate a male, her father. Additionally, Gina was much more into sadism than Mary; she really got sexual highs from inflicting pain, most often in the form of CBT on me, regardless of whether we were alone, with Mary, or with others. She researched the internet extensively and convinced me to either buy or build a collection of toys and devices for her to experiment with.
One weekend, shortly after starting college, she came home and brought her girlfriend with her. She called from her car on the way. "Hi, Daddy, just we'll be there in about 30 mins. Sue is with me, be ready for us, Daddy, be very ready", she giggled and hung up.
Mary and I had not met Sue, yet, but had heard about her from Gina. We knew that Gina had trusted her enough to tell her about the relationship between Mary and I, and that she also participated in that. Nonetheless, it was scary to know that I would be exposed and dominated by her in front of someone I'd never met, a young 19-something year old girl, at that.
Not quite knowing what to expect, Mary and I talked and she decided I should wear panties, stockings and a camisole under some thin silk pants she had bought me, and an equally thin shirt. I would not be blatantly exposed, but the lingerie would be clearly visible with anything more than a 1 second glance. Mary, realizing that Gina would quite possibly want full access to my cock and balls, unlocked the CB6000 that I had been wearing since Gina had found them on the web and insisted that I buy for myself about a year ago. Both Mary and Gina had a key to the small padlock which prevented me from removing it myself.
"I trust Gina completely, slut," Mary said, "if she trusts Sue with this, then so do I. just because you don't know her is not even close to a reason to embarrass Gina and I, in fact the reverse. It makes it even more important that if Gina decides to torment, humiliate or otherwise dominate you, then you will enthusiastically accept and obey instantly. Do I make myself clear?"
"Yes, Ma'am, yes, you do"
"Good. Furthermore, I hope it goes without saying that if Gina invites Sue to do or say anything, you will give her the utmost respect. She is a woman, and she deserves it."
Just as I was about to answer, we heard a car door slam outside and knew they had arrived. I rushed downstairs, glancing at the kitchen where I had put wine in an ice bucket and set out glasses for everyone, and went to the front door. I saw their silhouettes through the glass of the door, and opened it as they reached the front porch.
Any doubts I had about Gina's intentions were instantly answered by her greeting. She gave me a kiss on the cheek and then "Hi, Daddy. Sue, this is our slave and slut. Come on in and meet my Mom. Our bags are in the car, Panty-Man, get them and take them into our bedroom."
Sue smirked at me with wide eyes as they travelled up and down my body.
"It's a pleasure to meet you, Sue, I hope you will feel completely at home here this weekend."
She giggled and followed Gina into the house, while I went out to the car and retrieved each of their bags and carried them in and took them down the hall into Ginas' bedroom. By the time I returned Gina, Sue and Mary were sitting together in the living room.
I hurried to the kitchen, opened the Reisling (Gina had developed a taste for sweeter wines), and carried it in the ice bucket, and the glasses over to them. As I poured the wine, I felt Ginas' eyes examining me. "I see you were a little shy getting dressed, Daddy. There's no need for that. Sue knows all about what a panty slut you are, and has been looking forward to seeing for herself. Isn't that right, Sue?"
She blushed slightly and giggled again. "Yeah, I knew there were men like that, of course, but I've never umm met one before." She looked over at Mary, with a worried expression "I, err, I hope that's ok? Gina said it would be but, you know, I don't want to like offend you?"