Right in her pussy

Since being fucked with an actual dick is such a rare treat for her, you decide to give her the full experience. You fuck Sera fast and hard, and she realizes what's coming, trying to climb off your cock and swallow your cum instead. Your grip on her hips is too tight! Though she struggles, your cock is soon rammed deep inside her as you start to shoot a massive wad of cum directly into her womb.

She moans loudly at the unfamiliar sensation, and you grin to yourself at how much the little lesbian sounds like a whore who loves a nice hard dick. Your cock grinds hard against her cervix, shooting load after load of cum into her, until you swear her belly must be bulging outwards. Her pussy, meanwhile, no matter how much she struggled a moment ago, clamps down on your shaft in a massive orgasm. It milks every last drop from your balls, until finally you let go of her and lay back, relaxing in the afterglow.

Sera does nothing but gasp and breathe heavily for a few minutes, trying to catch her breath. Then she lifts herself off your cock, making a loud squelching sound as it slurps its way out of her tight canal, followed by a thin stream of cum oozing out of her gaping quim. She turns around, as fast as she can considering how gingerly she has to move, and socks you in the shoulder hard.

"You cheeky cunt! I oughta gut you for that! I don't let NOBODY cum in me like that!" Though she's trying her best to look angry, her lips keeps curling up in a bit of a grin. She does punch you in the shoulder again, though.

With a big smile on your face, you hold up your hands in a mock apology. "Won't happen again, I swear!" Well, unless you change your mind in an hour or so. She stands up weakly and crosses her arms, glaring for a moment more before turning around and walking away. Once her back is turned, you decide to get her back for the bruise she's surely left on your arm, and you wave your hand lightly, casting a spell. Inside her body, deep in the back of her cunt, your give your sperm a little helping hand in doing their job. She doesn't feel a thing, but you just impregnated her. Well, she'll figure it out eventually, but that won't be for a couple months and you're sure to have made her a complete cock slut by then.