James came running when he heard Abigail yell and Kiara and I quickly covered up.
"Abby, what is..." then he saw us. "What the hell?"
Before we could say anything, James grabbed Abby by her arm and they disappeared down the hall.
"Fuck!" I said, "If they tell mom and dad, they'll fucking kill us!"
"They won't kill us." Kiara said, "Maybe beat the living shit out of us, but not kill."
"We're fucking dead" I said, "They're gonna kill us."
Then my sister got a gleam in her eye. "Not if they're in on it."
"Wait." Then I saw the look on her face, "You mean blackmail?"
"Blackmail is such an ugly word." she said, "I prefer to think of it as showing them our side of things. You work on Abby, I'll take care of James."
"How exactly?" I said pulling my pj bottoms and shirt on.
"Oh, you'll think of something, bro." she said, pulling on her nightshirt. "You always do." She leaned up and kissed me, "Let's do this."
I headed down the hall to Abby's room and knocked. "Abs?" I opened the door a crack, "Abs?"
She was sitting on the bed, looking like she was either going to cry or punch something. In the end she just looked up at me.
"How could you? She's your sister!" she said as I closed the door behind me.
"Look, I'll explain everything, just don't tell my parents okay? Dad will fucking kill me if he finds out about this." I said moving to sit down next to her. She inched back from me a bit, but didn't kick me out, or yell at me, so I took that as a good sign.
"Look, I know that was..." I searched for the right word. "Awkward to walk in on."
"That's an understatement." she snapped. "I mean, you two... have you been doing that for long?"
"About six months or so." I admitted. No sense in lying now. "Look, you've been to the house enough times, you know how our bathrooms are set up..."
I then proceeded to tell her the short version of how I walked in on Kiara and how that led to her admitting her less than sisterly feelings for me, and how that led to us having sex. Abby squirmed a few times as I relayed the story.
"...and like I said, it's been going on pretty much on a regular basis for the last six months, give or take." I said.
For a long moment neither one of us spoke.
"Can I tell you something? Just between us?" she finally said, "I honestly don't know if I'm more upset or turned on by what I saw. Is that wrong? I mean you guys are my cousins. But seeing that... I've never even seen anyone having sex, let alone had it."
"Seriously? Never?"
She shook her head and offered me a shy smile. "You know how my parents are. I'm still a virgin at 24."
"Let me guess, Aunt Rose gave you the 'no sex until marriage' talk, right?" she nodded. "You know that makes her a hypocrite, right? She wasn't a virgin when she married Uncle Joe."
"How do you know?" Abby asked me, eyes wide.
"I overheard a phone conversation with her and mom once," I said, "I specifically heard my mother say 'I wasn't a virgin when I got married, and neither were you, so why should we push that on the kids?', she changed the subject when I walked into the room, but she knew I heard what she said."
"Wow," Abby said, "I guess mom is a 'do as I say, not as I do' type."
"So you've never even had an orgasm?"
"Oh, I've had plenty of orgasms." she said, "I... god it feels so weird telling you this... I've... you know... touched myself."
"It's called masturbation, Abby. You can say it, it's normal. There's an old joke; 98% of all people admit they masturbate, the other 2% lie."
She laughed and finally looked up at me, "Alright, I admit it, I masturbate, a lot. Sometimes twice a day. I've just never had anything inside me, I stuck my finger in once, just a little, but I was afraid that would, you know..."
"I don't think you can do that by masturbating, but I'm not gonna google it because I don't wanna end up on some watchlist." I said.
Another awkward silence broken by Abby again.
"You know, that's the first time I've ever seen... that." she pointed vaguely in the direction of my groin.
"You mean to tell me you've never even seen a dick before?" I asked.
She giggled a bit at my use of the term "dick", and shook her head. "No, I've seen them before... well I've seen pictures, but I've never seen one in person before. Can I... I mean will you... can I see it again? Please?"
My dick, which had gone limp when Abby caught Kiara giving me a blowjob, suddenly jumped to life as if to say "Hey, did someone mention me?" and started rising to the occasion. Abby was definitely more confident without her parents around. I wondered if this part of her was always under the surface of the appearance she put on for her parents, or if it had just come out when she caught Kiara and I. Either way, I wasn't going to refuse.
"Sure," I said, pulling down my pants as my cock sprung free, almost fully hard at this point.
Her eyes went wide and she tentatively reached for it but pulled her hand back, she looked up at me.
"Can I... can I touch it?"
I smiled and nodded, she slowly reached forward and wrapped her hand around my now fully erect cock.
"Wow, it's... " she gave me a gentle squeeze, "Does that feel good? Am I doing it right?"
"That feels good Abs." I said, putting my hand over hers, "Just stroke it up and down like this."
With my hand on hers I got her to masturbate me. I reached for her shirt and started to pull it up revealing her perfect tits. She reluctantly let go of my cock long enough for me to get her shirt all the way off. Her tits were about the same size as Kiara's but her areola were tiny. About the size of dimes (Kiara's are about the size of quarters for comparison), topped with pert little pink nipples that looked like they were hard enough to cut glass. Abby's inhibitions seemed to melt away with each second as she actually moaned a bit when I gently squeezed one breast, running my thumb over her nipple.
She bit her lip as I did it again, then slowly ran my hand down across her stomach to the waistband of her pj's, I untied them and she looked at my hand, and then back at me and nodded.