Jake and Alex had been together for three years, both openly gay and never once interested in women. That changed the night they met Lena at the bar. She was blunt, buying them shots and saying straight out she wanted to watch two guys fuck then join in. They laughed it off at first, but after too many drinks and her hand sliding up Jake's thigh, they agreed to go back to her place.
Lena stripped fast, her tits bouncing free as she dropped to her knees between them. "Show me those cocks," she said. Jake unzipped first, his dick already half-hard from the weird thrill. Alex followed, both of them standing there with their hard cocks out while Lena grabbed them, one in each hand. She stroked slow, comparing the feel, then leaned in and licked Jake's head, tasting the precum.
"Fuck, that's different," Jake muttered, watching her tongue swirl around his shaft. Alex's hand found Jake's ass, squeezing like always, but now there was this woman sucking them both in turns. Lena took Alex deeper, gagging a little as she worked his cock into her throat. Jake stroked himself watching, the sight making him throb harder than he expected.
She stood up and pushed them toward the bed. "One of you fuck me while the other watches." Alex went first, rolling on a condom and lining up behind her as she got on all fours. Jake sat back, jerking off as Alex pushed his cock into her pussy. Lena moaned loud, pushing back onto him. "God, you're thick. Pound me." Alex started thrusting, his hips slapping her ass, balls swinging. Jake had never seen Alex fuck like that, and it made his own dick leak.
After a minute Lena looked at Jake. "Your turn. Get over here." Jake moved in, swapping places. He slid into her wet cunt easy, the heat and grip feeling nothing like Alex's ass. It was softer, slicker, and he groaned as he bottomed out. Alex knelt beside them, feeding his cock to Lena's mouth while Jake fucked her.

The sounds filled the room: skin slapping, wet sucking, her muffled moans around Alex's dick.
They switched again, this time with Lena riding Jake while Alex moved behind her. "You ever thought about fucking a guy and a girl at once?" she asked, grinding down on Jake's cock. Alex pressed his lubed fingers to her ass, working one in slow. Lena gasped and clenched around Jake. "Do it," she said. Alex pushed his cock into her ass while Jake stayed buried in her pussy. They found a rhythm, double-stuffing her, both of them grunting as they felt each other through the thin wall inside her.
Jake came first, shooting deep in her cunt with a rough "Fuck, I'm filling you." Alex pulled out and jerked off over her back, ropes of cum landing on her skin while Lena rubbed her clit and came hard, shaking between them. They collapsed in a sweaty pile, breathing heavy.
Lena laughed first. "Told you it'd be hot." Jake and Alex looked at each other, both still half-hard, the night far from over. They went again, this time with Jake in her ass and Alex in her mouth, then switched, trying every combination until the sun came up. By morning they knew one thing for sure: their first time with a girl had just opened a whole new door.