I was twenty-two when it happened, home from college for the summer and bored out of my skull at Grandpa's big old house. He was seventy-four, still strong from years of farm work, with that thick white hair and those rough hands that always made me shiver when they brushed against me. We were alone after dinner, the TV droning in the background, and I was wearing nothing but a thin tank top and tiny shorts because the heat was brutal.
Grandpa looked me up and down from his recliner and said, "You've grown up real nice, sweetheart. Those tits are begging for attention."
I should have left the room, but my pussy got wet instantly. I'd fantasized about this for years. "You like what you see, Grandpa?" I asked, spreading my legs a little so he could see the damp spot on my shorts.
He stood up slow, cock already bulging in his pants. "Come here and find out." I walked over and he grabbed my ass with both hands, squeezing hard. "Strip for me."
I pulled off the tank top first, letting my full tits bounce free. My nipples were hard as rocks. Then I shoved the shorts down, standing naked in front of him. Grandpa unzipped and pulled out his cock. It was thick, veiny, and already leaking precum, way bigger than any guy my age.
"Suck it," he ordered. I dropped to my knees and wrapped my lips around the head, tasting that salty drip. I took him deep, gagging as he hit the back of my throat. Grandpa groaned and held my head, fucking my mouth in steady thrusts. "That's it, good girl. Suck Grandpa's cock like you mean it."
I slurped and drooled, one hand rubbing my clit while the other stroked the base of his shaft. My pussy was dripping down my thighs. After a few minutes he pulled out. "On the couch.

Spread those legs."
I climbed up and opened wide. Grandpa knelt between them and rubbed his fat cockhead up and down my slit, coating it in my juices. "You want this old dick in your tight cunt?"
"Yes, Grandpa. Fuck me. I've wanted it forever."
He pushed in slow at first, stretching me open. It hurt and felt amazing at the same time. Inch by inch he sank deep until his balls pressed against my ass. Then he started pounding, hard and steady, the couch creaking under us. Each thrust slapped skin on skin and made my tits shake.
"Fuck, your pussy is so wet and hot," he grunted. "Tighter than your grandma ever was." He leaned down and sucked one nipple into his mouth, biting just enough to make me cry out. I wrapped my legs around his waist and met every thrust, moaning loud.
He flipped me onto my hands and knees after a while and slammed back in from behind. His big hands gripped my hips, pulling me back onto his cock like a rag doll. "Take it, baby girl. Take every inch of Grandpa's dick." One hand reached around to rub my clit in rough circles. I came hard, pussy clenching and gushing around him, screaming his name.
Grandpa didn't stop. He kept fucking me through the orgasm, then pulled out and pressed the head against my asshole. "Ever had it here?" he asked.
"No," I panted. "Do it."
He worked a finger in first, then two, stretching me while I moaned. Finally he pushed his cock into my ass, slow and steady until he was balls deep. The burn mixed with pleasure as he started thrusting. I reached down and fingered my pussy while he fucked my ass, coming again even harder.
He pulled out at the end, flipped me onto my back, and stroked his cock over my tits and face. Thick ropes of cum splattered across my skin, some landing in my open mouth. I licked my lips and swallowed what I could.
We didn't stop that night. After a short break he took me again in the shower, then once more bent over the kitchen table before dawn. By morning my pussy and ass were sore, cum leaking out of both holes, and I knew this was only the start of the summer.
Grandpa kissed my forehead as the sun came up. "You're mine now, girl. Any time you want it, just ask."
I smiled and reached for his cock again. "Right now, Grandpa."