It's not right to assume a girl wants semen shooting in her mouth

You decide you should warn her that you're about to blow your load and croak out, "I'm gonna cum, babe"

Kara's concentrating so hard she doesn't fully comprehend what you said and keeps sucking and stroking.

"I warned her," you think. "Maybe she wants it in her throat," you rationalize. Still, you warn her again, "I'm cumming!"

She feels the first two spurts but keeps going, not fully comprehending yet, until the bitter flavour hits her tongue. Realization dawns in her dim brain and she pauses her actions apparently considering her options. You figure, at this point she's thinking you're almost done now and there's already sperm in her mouth, so... suck on.

You realize you were right when, closing her eyes, she swallows a big mouthful of semen. She sucks a little more and then slurps from your cock, swallowing again.

"How was that?" she asks you, her eyes batting up at you, a valiant attempt at a smile on her lips, sort of resembling a grimace.