The safe way... for now

You get behind her and rub your cock along her ass crack, while squeezing her asscheeks together and smearing them with precum oozing from your painfully erect dick. Tina moans and wriggles her ass which arouses you even more. You grab your cock and thrust it between her thighs rubbing it along her pussy slit, making Tina shudder when your mushroom touches her sensitive clit.
Before you could decide which hole to fill with you rod, Tina moved her hips untill your cockhead aligned with her wet pussy and thrust her ass backward hard taking all of you in. You slid in her wet cunt easily. Her pussy was practically dripping wet from the excitement. The warmth of her pussy enveloped your cock.

• Aaahh! You feel great inside of me. Mmmmhh! I love the way your fat cock fills my pussy! Tina said with a purring voice.

She started to move her hips, gyrating on your manhood, making room for it in her vagina. Than she started to fuck herself on your dick, arching and bucking her back, slapping her asscheeks on your pelvis with each thrust backwards.
Surprised by her eager actions, you stared in awe at her beautiful ass as she fucked you. You loved the magic show in front of your eyes... Tina made your dick disappear only to make it reappear a moment later. Every time she moved forward her pussy walls squeezed your cock trying to milk it.
You gently slap her right asscheek making her gasp in surprise. As much as you enjoyed her fucking you, you grab her hips and start thrusting faster in and out of her hot pussy. You lean forward and nibble her left ear. Tina's moans fill the cold air as the two of you fulfill your desires.
Slowly, you move your left hand between her thighs and gently start to rub her swollen clitoris. The added stimuli brings Tina closer to her orgasm and her body starts to quiver slightly. Her impending orgasm makes her pussy walls tighten around your shaft. This in turn brings you closer to the edge.
Feeling the familiar tingle in your balls, you thrust faster and deeper. Moans and slapping noises fill the night's chilly air.

• I'm cumming! You manage to warn Tina between grunts.