You want to call her attention with what would be a simple "Hey, sexy!", but instead you croack deeply. She wakes up form that state and looks you deeply in the eyes. She's appalled at your sight, but at the same time, a joyful glee comes to her eyes. She stands up...her froggy, green, plumpy breasts jiggle enough to make her shirt fall. Her slender fingers (way more elegant and less bulky than yours) take of her underwear and she hops on the bed. As if she knew what she was doing without any second thoughts, she squats like an amphibian on a lilypad, lowers her torso exposing herself to you.
She ribbits - you know what she seeks.
You jump forward and hopped on top of the bed; you cannot feel less than a clumsly, fat swarthy toad in the presence of an elegant tree frog. However, those sentiments quickly disappears as she softly whispers another croaking sound. You mount her and she moans a very human-like sound that she whimpers repeatedly as the night goes on.
Your big frog hands cover hers, as a way to stop her escape and your throat inflates slightly as you keep on thrusting her. She feels amazing - like never before. She was always so hot inside as a human, but now there was a lukewarm sensation, topped by a self lubricant substance that you knew what if was but smelled fruity. And the more your wife reached the orgasm the stronger the scent.
You are holding yourself expecting her. Suddenly you feel her head bobbing up and down, you check out that her throat is inflating in and out repeatedly; and out of nowhere, like a burp, your wife croaks something resembling a human moan and a genuine ribbit sound. That's when you let yourself go and come inside her. In a purely animalistic way!