Hard and fast... like we both want it.

I couldn't resist any more. I pulled the two halves of my fly apart, allowing my cock to spring out, aching for contact. Kaila pressed back against me as I did so, and I felt her wet arousal on my skin. The slick feeling caused another pulse of blood to shoot through my cock, and I eagerly pressed against her, grasping my cock with one hand and sliding up and down against her quivering folds.

"Brent...it... you..." She panted. Kaila glanced back at me with a nervous expression. "Fuck me..."

Unable to resist my wife's instructions, I found that elusive spot that we both ached for me to touch. The moisture on the head of my cock was an incredible relief to my urges and I shoved forward harder than I intended, bringing a squeal that I hadn't heard from Kaila's lips in far too long. That gasp that said I had gone almost too deep.

"...yeesss...." Kaila Gasped, pushing back against me hard. My hands naturally found their way to her hips, and I held on tightly, just feeling her quivering flesh surrounding me.

"You wanted me to fuck you for so long, Carla..." I whispered, enjoying the fantasy. I slid my hips back and pushed forward hard.

"Fuck me..." Kaila gasped. "Oh listening to you two... fuck me..."

The thought of Carla in her room jilling off as Kaila and I regularly fucked right next door. The thought was incredible, and brought another rush of blood to my cock, making it almost painfully hard.

"You liked hearing me fuck your sister? Liked hearing me breed her every night? How long have you wished it was you?" I snarled, slapping my flesh into her again. It felt right to fuck her this hard. Taking her like she wanted. This game was something we should have done long ago, to judge from how Kaila's pussy was already spasming on me, demanding more from me.

"...since... the... first... night..." Kaila panted, pushing back harder and faster. This was almost animal how hard we were going at it. Her body felt so good, so familiar. I wanted more. I needed more.

"You been rubbing your pussy? Been spying on me? How many times have you begged your sister to trade places?" I guess, fucking her hard, the impact of her ass against my lower stomach and thighs almost painfully intense. She was... ugh, thinking about her sister... It was bringing me close fast.

"Brent... it's... it's me..." Kaila panted pushing back against me just as hard. She really was enjoying this, I could tell. "It's... it's Carla... seriously..."

"Sure it is..." I smiled, continuing to fuck. "And if it was Carla, I'd still want to breed her..."

Kaila moaned ardently in response. Not as vocally as usual, which made sense, since anybody could have caught us, but... damn it was arousing. She lowered her arms, resting fully against the boulder as I continued to pound away at her presented sex.

"Brent... I could... you could... I want it..." Kaila moaned. "Oh, Fuck... I'm.... so... fucking....sorry... Fuck... Brent... DO IT... please..."

I felt myself beginning to pulse within her and I knew I couldn't last much longer, nor did I want to...