Fucked my best friends dad at her birthday party [FM]

I [F19] have been best friends with this girl since middle school, like we're basically sisters. A couple months back was her 21st birthday, and her family threw a big party at their house, like a nice suburban place with a pool and backyard bbq. i've known her dad (45m, fit, greying hair, kinda charming but always just "dad" to me) forever, and he's always been cool, like he'd sneak us snacks when we were kids. i show up in a sundress, nothing crazy, just summery, no bra cause it's hot, and i'm helping set up balloons and shit. the party's fun—music, cake, her cousins getting drunk, typical chaos.

i'm in the kitchen grabbing ice, and her dad's there, pouring himself a whiskey. he's like "u having fun, kiddo?" but his eyes linger on my dress, and i feel this weird flutter. i laugh, say "yeah, u old folks know how to party," teasing him. he smirks, says "u'd be surprised what us old folks can do." it's flirty, but i brush it off, thinking he's just messing around. later, i'm tipsy from some spiked punch, and i spill soda on my dress. he's like "go clean up in my bathroom upstairs, it's quieter." i don't think much of it, so i head up.

i'm wiping my dress at the sink, and he knocks, comes in, shuts the door. my heart's pounding, cause it's just us, music muffled downstairs. he's like "u grew up nice," and steps close, his hand brushing my arm. i should've left, but i'm frozen, and my pussy's tingling, guilt mixing with this dumb thrill. i whisper "we shouldn't," but he kisses me, slow and deep, and i kiss back, my hands shaking. he lifts my dress, gropes my ass, and i'm wet, hating myself but so into it. he's like "u want this, don't u?" and i nod, barely breathing.

he bends me over the sink in doggy, my dress hiked up, and pulls my panties down. his dick's out, hard and thick, and he slides it into my pussy, slow at first, then rough, my ass bouncing as he fucks me. i'm gripping the counter, moaning soft, scared someone'll hear. i cum fast, my pussy clenching, feeling like a traitor. he flips me, sits me on the sink in missionary, my legs around him, and pounds deeper, his hands squeezing my tits through my dress. it's intense, my head's spinning with guilt and heat. he pulls me to the floor, gets me in a spooning position, fucking my pussy from behind, his breath hot on my neck. i cum again, biting my lip to stay quiet.

When he was about to cumm I didn't let him pull out instead I let him creampiee mee it was soo hot feeling his thick girthy cock pulsate in my pussyy. It was so fucking amazing and I feel guilty at the same time wanting to fuck him again.