***This story starts as the events of Chapter 1 are coming to an end.***
Brent had been watching the events going on upstairs unfold on his phone. Up until now, he didn't really think Becky was putting much effort into his plans and felt that she was going to call his bluff on his threats. Then suddenly, the girls went from chatting about boys to the sexiest blow job practice session he had ever seen, and Brent had watched a lot of porn. Brent kept glancing over at his wife but she was still semi dozing while watching some sitcom. Becky was really going to town on that dildo, which made Brent's cock swell to fill his sweatpants. Brent became lost in the show. When Becky looked up at Katie and called her daddy, he started to subconsciously stroke his cock over his pants. After a few minutes he realized that he wasn't just hearing the girls' heavy petting through his earpiece, but he could hear the muted sounds here in the living room. Kat had heard it too and stirred from her doze just as Brent jerked his hand away from his dick. Precum had already soaked through his sweatpants, leaving a dark circle above where his swollen dick was pressing against his pants.
"Do you hear that?" Kat asked, not noticing his bulge hidden behind the arm rest of his chair. "Are the girls fighting again?"
The fighting had only started up somewhat recently, and it was really just arguments over whatever was most important to teenage girls on that particular day. The sounds were coming from the other end of the house and were indistinct through all the walls between them. Brent didn't want to interrupt Becky so early in the process. He also didn't think he could just walk in there and start fucking the twins. Despite Becky's sudden progress, it would take time to get Katie to open up to the idea of fucking her dad. Nor could he let Kat walk back there. She had never expressed any lesbian interest and Brent doubted she would approve of what the twins were doing or what Brent was planning. He glanced at his phone and saw that Katie was now all but fucking Becky's face. His cock was oozing precum freely now, but the quiet thumping he was hearing through the walls was causing Kat to start to get up.
"No, no honey. You relax. I'll go tell them to cool it."
Brent tucked his phone away, leaving the earbud in place. He hid the wet tent her was pitching by spinning away from Kat as he stood up. He limped through the kitchen and started down the hall, hoping the walk would soften his dick. The moans and thumps grew louder as he crept down the hall, keeping his dick at full attention. "Cum on me! Cum on my face", Brent heard as he peaked through the door crack. He watched in silence as the girls finished. He jacked his dick through his sweats as he gazed at the scene before him. As he stared at Becky's ass, he saw that the crotch of her thong was soaked through. She was fucking her pussy against the bed while her sister grabbed Becky's head and drove it against her own pussy. As Katie groaned her sister's name and came on Becky's face, Brent silently filled his pants with blast after blast of hot cum. He crept a few steps back down the hall once he had recovered enough to move.
Brent covered his mouth to sound farther away than he was and called, "Girls are you okay? Mom is worried you are fighting."
Becky, sounding out of breath, shouted, "We're fine daddy. We're just play wrestling."
"OK. Keep it down though unless you want me to come in there. You girls aren't to old to get a spanking."
The girls whispered to each other, but the high tech system he had installed in their room picked up every word. "Do you want daddy to spank you Kate?", giggled Becky. Katie whispered that she did not but both of the girls sniggered.
Becky yelled, "OK dad. We'll be good. Goodnight."
"Goodnight girls."
A few moments later, Brent walked past the girls room as he made his way to his room to change his pants. When he walked by, he saw that the girls were each sitting in their own beds with the covers pulled up to their waists. The dildo, however, had been left on Katie's bed. While Brent was in his bathroom, he texted Becky on the burner.
- I saw the end through the door. A+ so far. BTW you were loud enough to wake mom from across the house... and you forgot something on the bed.
Brent heard a shriek and a giggle before he received a response.
- OMG. Sorry. It's hidden now. That could have been bad.
- NP. I like where this is going. Need details. Be glad to help.
- OK perv.
Becky put the phone away. She had not meant to go so far with Katie, but one thing had led to another and she had ended up eating pussy through her sister's panties. Her loss of control concerned her a bit. She had not ever been attracted to her sister, but admitted to herself that she was beautiful. Becky didn't let Katie or her dad know, but she had cum herself while Katie was creaming her face. Becky was still wet at the thought of how hot the whole thing had been. Little, sweet Katie had turned into a sex machine for a brief moment and Becky had been the one to open that door to her sister. It was the corruption of that innocence that had turned Becky on. As she rolled over to go to sleep, she promised herself that what they did tonight was nothing compared to what she was going to do to Katie.
...
The next day Brent had Becky come into his home office while Katie was in the shower before school. Even though he had watched everything on the secret cameras, he had Becky fill him in as though he missed all but the end.
When she finished, Brent said, "That was pretty fucking hot."
"Thank you daddy. I'm just trying to be a good girl and do what you wanted", Becky said as she tried to look demure.
"Oh, so you didn't like it? You looked pretty into it to me."
"Well, it wasn't as bad as I thought. I'm no lesbian, but making her cum that hard was really hot. Plus she had never orgasmed before. So I was her first!"
"Well, I think you need to keep going. I don't think we can just jump from some panty kisses to getting fucked by daddy, do you? I'm going to order a few more toys and outfits for you. Do you have any ideas?"
"I told her you had a big cock and she didn't complain when I pretended she was you. So definitely keep whatever you order in your size range and I'll keep that image in her head."
