Time for a midnight snack.

You get out of bed, making sure not to disturb your slumbering wife, and tiptoe into the guest room where Gemma is sleeping. You pull the bedsheets off the top of her, revealing her completely naked form and the pink vibrator lying on the mattress next to her. Most likely it ran out of battery over an hour ago. She wakes as you spread her legs open, revealing her swollen and sensitive pussy, and groggily rubs her eyes. You reach down and twist the buttplug which still lies embedded in her ass, and pull it out, revealing your jizz from earlier in the evening coated all over the shiny metal of the bulb. You reach forward and push the buttplug between her lips, gagging her with the huge toy and making her swallow your cum and taste her own ass.

You shove your cock inside her butthole, with your cum serving as an adequate lubricant. Whilst initially it feels just as if her ass has been stretched out all evening, you rapidly feel the sensation of her anal walls constricting around you as her elasticity returns her to her usual tight state. You fuck her hard and fast, your pelvis slamming up hard against her asscheeks with a loud slap. You don't care about the sound, as it's unlikely to travel all the way to your bedroom, let alone wake up your wife. What's more important is getting this done quickly, and it only takes a couple of minutes of wild pounding until you're unloading your balls into her ass. You pull the buttplug out of her mouth - a long trail of saliva along with it - and plug her ass back up so that she can spend the rest of the night with your warm seed inside of her.