She knows Diane is lying

"Seriously mom? Mia and I have both known what you're like ever since we were teenagers and we saw you getting spitroasted out by the pool by Mr Sanders and Mr Peterson." Tracy says in a surprising twist of events.

"Ah!" Diane lets out after being accused like this. "First of all, you two were not meant to see that. And second of all, perhaps if the two of you would have studied a little harder then I wouldn't have had to get your grades up by screwing your maths and english teachers." She replies in a swift defence, not even trying to deny it.

This time it's Mia who interjects.

"Oh yeah, well what about the time we could hear the bed squeaking upstairs whilst you were getting fucked by the TV repair guy. Or the time you disappeared at our hotel in vegas to come back after midnight walking crooked and with what looked like a bit of cum dripping from your mouth. Or the time..."

"Alright that's enough!" Diane shouts, interrupting her daughter before she can add to the pile of stories produced thus far.

Diane is now staring at the floor, likely contemplating her choices in life at this point. You recognise this as your moment to strike and secure exactly what you hoped to achieve this evening.

"Look girls. In my eyes, there are two ways this can go. The three of you can either walk away in shame, knowing all that you know about each other now. Your relationship likely ruined, seeing as you won't be able to look your daughters in the eye after this, Diane." You say.

The three of them look at each other sheepishly before averting their gaze back to the ground.

"Or, you can use this as a bonding opportunity. Women like you are few and far between, wouldn't it be nice to share in these depraved fantasies and your love of cock and cum together, as a family. Girls, your mother is clearly where you've developed these... traits... from. And Diane, is it really so bad that your daughters have ended up more like you than you would've liked. Now that you know just how similar each of you are to one another, use that to help strengthen your relationship, not ruin it. It wasn't so long ago that the two of you, Tracy and

Mia, got used to the idea of sharing in this lifestyle together, would it really be so hard to share with one more. And you, Diane, I know that your relationship with your daughters has been fading in recent years. Don't you want to get closer with them now, not further apart?" You say.

All of this feels like a complete stab in the dark, but you can't help but feel hopeful as you await a response from the three girls.