"Girls.... girls stop, what are you arguing about."
"Nothing Mommy."
"It's something, you don't argue about nothing."
"You wouldn't understand."
"Brittany it would surprise you what I understand, tell me."
"Yeah Britt tell Mommy you're the one with the big mouth supposedly."
"Shut up Jaz your just jealous."
"Girls enough."
Brittany and Jasmine are my twin 18 year old daughters, I know siblings fight with each other but the girls are different. They barely fought with each other growing up, the fighting was generally directed at some other poor person that angered one of them. In the last couple of years even a raised voice between them was unusual.
"Alright Brittany enough tell me what you are arguing about."
"But Mom."
"No buts young lady, what are you two arguing about."
"Greg."
Greg is my 20 year old step son, I married his father Drew ten years ago. Both of us lost our partners in separate accidents several years earlier.
"What did Greg do."
"Nothing Mom," Jasmine says.
"Well then Jasmine why are you arguing about him."
"Ah....well....um...I...I can't tell you, it's too embarrassing."
Both girls are acting very strange, looking at the ground, fidgeting about.
"We're all adults, you know you can tell me anything girls, I'll understand."
I'm starting to feel nervous myself, what could be possibly too embarrassing involving Greg for the girls to tell me. A lot of thoughts are going through my mind and not all of them are nice.
I turn my attention to Brittany, if either of them are going to talk it's her.
"Com 'on Brittany tell me what's going on NOW!"
"Um....ah...we...well...um...we were talking about...um....Greg."
"You were doing more than just talking about Greg."
"Well it was all Jaz's fault, she wouldn't believe me."
"That's because your a liar, there's no way you could swallow ten inches of his cock."
"I could so, your just jealous that you could only swallow six inches."
What the fuck, I can't believe what I'm hearing, my daughters are arguing about how much of there step brothers cock they could swallow.
"Greg's cock...."
"Oh Mom you wouldn't believe how big it is, it's longer than my forearm and it wasn't even hard," Brittany says a hand moving up and down between her elbow and wrist to demonstrate.
"And thick Mom, it's thicker than my arm," Jasmine adds wrapping her fingers around her arm.
"Greg's your...your step brother, you...you can't talk about him like that."
"But Mom it so huge, I've never seen a cock that big before." Jasmine says.
"Me either," Brittany adds.
I'm not naive enough to think the girls haven't seen a cock before, I don't even think they are virgins but Greg, Greg is their step brother.
"Girls you shouldn't be spying on Greg and you definitely shouldn't be thinking about his penis like this."
"Mom we weren't spying," Brittany says.
"Then how did you see his penis then, did he show you?"
"No, no Mom, Greg doesn't even know we've seen his cock," Brittany says.
"How then?"
"A while back I got up early to go to the bathroom, I opened the door to see Greg walking to his room, he only had a towel wrapped around his waist. As he opened his door he removed his towel and I could see his cock," Jasmine said.
"Yeah and she told me so next morning we both got up early, we watched for Greg leaving the bathroom. Again he only wore a towel which he removed as he opened his bedroom door."
From the girls open door your get a clear view of Greg's door which is only a few steps away, with the door slightly ajar they definitely would get a profile view of Greg's body.
"Well girls that's beside the point, you wouldn't like Greg peeking at you so you shouldn't be peeking at him."
"No Mom," they say in unison.
"Right that's it, no more peeking out your door and definitely no more discussing Greg's penis, agreed."
"Yes Mom."
I leave their room stopping briefly outsides Greg's before moving away.
Even though the girls have said they won't look the temptation is still there and knowing human nature temptation will be too strong. I need to confirm what the girls saw and if necessary talk to Greg.
Greg works four days a week having every Tuesday off, he has his morning shower before 5.30am each work day. From my bedroom I can also see Greg's room, tomorrow morning I'll get up early to see for myself what Greg does.
I'm up just before 5.30am, my bedroom is further down the hall from Greg's, I open my door just enough to peer out and wait for Greg to appear. Just as the girls said Greg walks down the hall with a towel wrapped around his waist, as he reaches his door he grabs the handle at the same instance he pulls the towel off, momentarily standing naked in the hall before stepping through the doorway."
"Oh my god," I gasp as the towel is removed, Greg briefly glances up and down the hallway before stepping into his room.
I'm frozen to the spot, the girls were right Greg's cock is huge, if anything they underestimated the size with their measurements, it's a monster cock.
I'm still standing with my door partly ajar when Greg steps back into the hallway, he walks down the hall passing my door dressed for work. I hold my breath as he walks by, there's no indication from him that he's aware of my presence.
Turning around I stare at Drew lying asleep in bed, Drew's cock is a good size but nowhere near the size of his son's. The question is what do I do now, do I tell Drew getting him to talk with Greg or do I deal with it myself.
I climb back into bed beside Drew, my hand sliding between my legs as I think about Greg's cock.
Next morning I'm once more peeking out my door as Greg walks down the hallway, like yesterday as he reaches for the door knob he pulls the towel off. Today he doesn't immediately step into his bedroom, he stands naked for several seconds looking straight ahead before stepping from sight.
As Greg disappears from sight the movement of the girls door catches my attention, I'm not the only one up early.
"I thought we agreed no more peeking at Greg in the morning," I say stepping into the girls bedroom. They are both sitting on Brittany's bed and jump as I open the door stepping in.
"Mom, we weren't, what are you doing up?" Brittany asks.
"What I'm doing doesn't matter, what's important is what you two were doing."
"We got up early to do some homework, I was going to go to the bathroom and saw Greg when I opened the door. Remembering what we promised I quickly closed the bed to wait until he was gone."
"Do you think I was born yesterday Jasmine, get ready for school and we'll discuss your punishment tonight."
"Yes Mom."
"Yes Mom."
Greg is gone when I leave the girls room, I make my way to the kitchen and start preparing breakfast.
After considering my options I decide to deal with Greg directly myself, I'm his mother after all and Drew is going away on the weekend for work next week. On Monday morning I will go to his bedroom after his shower and confront him, basically catch him in the act.
Monday morning I watch Greg perform his normal routine, maybe it's just an unconscious habit and he doesn't realise he's doing it.