Conclusion
The startling discovery of their parent's fortunate indiscretions was the subject of discussions for weeks, as you can imagine. To have their sisterhood confirmed scientifically, as well as emotionally, had a bigger impact, psychologically, than I would have expected. It took a while for everything to settle down. Aside from that, however, a pattern developed in which Sandy and I had our school obligations and Helen stayed home and made life easier for us by taking care of the house. She was planning to resume her professional career after the babies were born, but instead of worrying about day care when Sandy started teaching again, Helen decided that she would postpone her ambitions and be a stay-at-home mom until both children were ready for day-care. A household with two women was going to be quite convenient!
However, before we got to all of that, something unexpected happened. It turned out that if Helen had opted to stay in the suite, instead of living upstairs, it might have been somewhat crowded down there.
About three weeks after her New York field trip, Sandy received a call from Frank saying that he would be in town seeing his old adviser to wrap up some details of his dissertation research as he considered publication. Naturally, he wanted to get together, i.e. sleep with her, if they could arrange it. Sandy was hesitant and promised to call him back. Her only reservation was Helen. She asked me and I just said to check with Helen, not with me. Sandy admitted that she was a bit embarrassed, but, finally, she explained the situation. She and Frank would be spending the night in the mother-in-law suite and she felt funny with Helen here. Helen's reaction was prompt and unequivocal.
"My god, honey, this is your home β well, our home now, I guess β but, regardless, you can do what you like. If Mack is ok with you sleeping with him down there, I certainly have no objection. You told me all about your affair and I completely approve." Then, giggling, "Besides, I'll be upstairs sleeping with your, no, our husband at the same time! That's sexy!"
I came in and heard the end of their conversation and added, "I like this! Now I have two wives and if one is being screwed downstairs, I can screw the other upstairs in our bedroom!"
"Well, I guess that's fair. Frank fucked me up there and now you can have Helen!"
"Yeah, and maybe we'll watch you get fucked!"
"Don't you dare! Helen wouldn't want to see that and, besides, I'd be embarrassed if I knew both of you were watching."
Helen jumped in, asking, "What do you mean about watching? How would we do that?"
"Oh, didn't she tell you? We have a video camera set up down there so I could watch them and/or record it so we could both watch afterwards. It was fun for a while, watching Sandy being spanked, for example!"
"Mack!"
Grinning, I replied, "Oh, didn't you tell Helen about that! That was quite entertaining!"
At that point, Helen joined in, saying, "You know, I've only seen one porn film in my life and I've never seen a live sex show. It sounds like fun, particularly since I'll know the female lead!"
"Mack, I'm going to kill you!"
"Oh, come on, honey, you put on a good show and I know that you'll enjoy having a bigger audience. Call Frank and set up your rendezvous and I'll check to make sure that the camera still works."
When we were alone later, Sandy, understandably ill at ease, asked me, "Honey, were you serious about you two watching Frank and me? You and I had a lot of fun watching the recordings in the past, but that was just the two of us. I'm really afraid that Helen would be...well, shocked might be too strong, but something like that. It's one thing to know that I had an affair with Frank and another to see him fucking me. What would she think seeing me sucking him or, damn it, him spanking me! Why did you mention that? Anyway, that's not going to happen, but you know what I mean. I'm afraid that she'll think less of me! Actually, as you know, I was shocked myself when I saw things I did or heard things I said. I...I just don't know if I can be myself if she's watching."
"Look, Sandy, you do what you want. If you have concerns like that, I'll see that the camera just won't work. I don't want you to be embarrassed or inhibited. Actually, I'm sorry I mentioned anything about watching without talking about it with you first. I really was teasing and it got out of hand. Ok, the camera will be out of action unless you change your mind. We'll just tell Helen that the equipment won't work anymore."
"That makes me feel better, dear. I suppose it's silly, but it did worry me. Thank you!" The relief on her face made it evident that she had been seriously concerned.
I assumed that the issue was decided and I wasn't particularly disappointed. While Frank had Sandy in the suite, I would have Helen in our bed. I certainly had seen the porno show they put on and had stopped watching long ago, so I wasn't out anything. However, there were discussions going on of which I was not aware.