I showed up at his door in a tight tank top and cutoff shorts, knowing exactly what I was there for. Mark was a single dad with two kids at school all day, and the second he opened up and saw my tits straining against the fabric, his eyes went straight down. "You're the nanny?" he asked, voice already rough. I nodded, stepped inside, and dropped my bag. "Yeah. And I fuck the dads who hire me."
He didn't waste time with small talk. By the end of my first hour there he had me bent over the kitchen counter, shorts yanked down to my knees, and his thick cock slamming into my wet pussy from behind. "This what you want, you dirty little nanny?" he grunted, one hand fisting my hair while the other slapped my ass hard enough to leave a mark. I pushed back against him, moaning loud. "Yes, fuck me harder. Use that nanny cunt." He did. He pounded me until my legs shook and I came all over his dick, juices dripping down my thighs onto the floor. Then he pulled out, spun me around, and shoved his cock down my throat until he flooded my mouth with hot cum. I swallowed every drop like the greedy slut I was.
That became our routine. The kids left at eight and we had until three. Mark used me everywhere in that house. He fucked me on the couch while I rode him, my big tits bouncing in his face as he sucked my nipples raw. He bent me over the washing machine and drilled my ass with spit for lube, stretching my tight hole until I screamed his name. One afternoon he made me crawl to him on all fours, naked except for the apron, and eat my pussy while I sucked his balls. "Good nanny," he growled, fingers pumping into me. "Keep that mouth busy or I'll fire you and find a new one." I just moaned around his cock and sucked harder.
We got filthier every week. He started leaving the bedroom door open so I could hear the kids' rooms down the hall, the risk making my pussy drip even more. He'd order me to wear short skirts with no panties and bend over to "clean" while he watched, then he'd flip the skirt up and bury his face in my ass, tongue fucking my hole before he stood and rammed his cock straight into my soaked cunt. "Tell me you're my live-in fucktoy," he'd demand, balls slapping against my clit with every thrust. "I'm your nanny fucktoy," I'd pant back. "Use me whenever you want."
One morning he woke me up by sliding his morning wood between my thighs from behind. I was still half-asleep when he pushed inside my pussy and started slow-fucking me, one hand reaching around to rub my swollen clit. "Gonna fill this nanny pussy before the kids wake up," he whispered against my neck. I pushed my ass back, taking him deeper, and came hard when he pinched my nipple. He followed right after, pumping thick ropes of cum deep inside me. I spent the rest of the morning feeling it leak out into my panties while I made breakfast.
By the end of the month he had me trained. I'd drop to my knees the second the front door closed behind the school bus, unzipping him and deep-throating his cock while he checked work emails. He'd fuck my face until tears ran down my cheeks, then flip me over the arm of the couch and take whatever hole he wanted that day. Sometimes he'd make me finger my own ass while he watched, then replace my fingers with his cock and pound me until I squirted all over the cushions. Other times he'd tie my wrists with his tie and edge me for an hour, only letting me come when I begged like a desperate whore.
The hottest was the afternoon he invited a buddy over "to watch the game." I served them beers wearing nothing but an open robe. Mark's friend stared while Mark bent me over the coffee table and fucked me in front of him. "See how wet this nanny gets?" Mark said, spreading my cheeks so his friend could watch his cock stretch my pussy. I came twice before Mark pulled out and let his friend slide in. They took turns using me, filling both holes, calling me their shared nanny slut until I was a shaking, cum-covered mess on the rug.
Mark never fired me. He just kept me on, using my body every weekday like the personal fucktoy he'd hired. And every time the school bus pulled away, I got wet knowing exactly how the day was going to end: with me on my back, legs spread, taking every inch of cock he wanted to give his dirty nanny.