I was under the hood of Mom's old sedan when she leaned in next to me, her tank top soaked with sweat and clinging to her big tits. It was just the two of us in the garage on a hot Saturday, Dad out of town. She handed me a wrench and said, "Hand me that socket, baby. This fucker's been leaking oil for weeks." Her voice was low and rough from yelling over the radio. I passed it over and watched her reach deep into the engine, her ass pushing out in those cutoff shorts. Her cheeks were half out, and I could see the edge of her black panties.
My cock got hard fast. I was eighteen, horny all the time, and Mom was the hottest woman I knew. She caught me staring. "What, you like the view?" she asked, not moving. She wiggled her hips a little. "Fix the damn car first. Then maybe we talk about what you're looking at."
I dropped the wrench. Mom straightened up, wiped her hands on a rag, and stepped closer. "You've been staring at these tits since you were old enough to notice," she said. She grabbed my hand and put it on her left tit. It was heavy and warm through the thin cotton. Her nipple was already stiff. "Feel that? That's what happens when my son can't keep his eyes off me."
I squeezed. She moaned low and pushed her chest into my palm. "Fuck, Mom," I said. My voice cracked. She laughed dirty and reached down, grabbing my cock through my jeans. "Yeah, fuck Mom. That's the idea." She unzipped me right there, pulled my dick out, and started stroking it hard and fast. "Been wanting this thick thing inside me. Car can wait."
She dropped to her knees on the concrete and took me in her mouth. No teasing. She sucked deep, gagging herself on the first try, spit running down my balls. Her tongue worked the underside while she pumped the base with one greasy hand. I grabbed her hair and fucked her face a little. She looked up at me with watery eyes and didn't stop.
"Get up," I told her after a minute. She stood, wiped her mouth, and turned around. She shoved her shorts and panties down in one move, bent over the open hood, and spread her legs. Her pussy was shaved smooth and already dripping. "Put it in," she ordered. "First time fucking your mom, so do it right."
I lined up and shoved my cock straight into her wet cunt. She was tight and hot, gripping me all the way to the balls. Mom grunted and pushed back.

"That's it, fuck me like you mean it." I started pounding. The car rocked a little with every thrust. Her ass slapped against me, and her tits swung under the tank top. I reached around and pinched her nipples hard through the fabric.
She talked the whole time. "Harder, baby. Your dad's never fucked me like this. Fill Mom's pussy up." I slammed into her faster, the wet sounds loud in the garage. She reached back and spread her ass cheeks so I could go deeper. I felt her cunt start to squeeze. She came hard, yelling, juice running down her thighs and onto the floor.
I didn't stop. I pulled out, spun her around, and lifted her onto the edge of the hood. Her shorts were around one ankle. I shoved back inside and fucked her facing me, watching her face twist up. She wrapped her legs around my waist and clawed my back. "Cum in me," she said. "Give Mom that first load."
I buried myself deep and unloaded, pumping thick ropes straight into her pussy. She held me there, milking every drop with her walls. When I pulled out, cum leaked out of her and dripped onto the engine bay. She scooped some up with two fingers and licked them clean.
Mom grinned, sweaty and satisfied. "Car's still broken," she said. "Guess we'll have to stay out here a while longer." She slid off the hood, turned around again, and bent over. "Round two. This time I want it in my ass."
I was already hard again.