Eric could feel his penis swelling from its sheath as the scent of Elle became stronger.
Eric moved behind Elle and then climbed up on top of her. With surprisingly little effort, he was able to find her vagina with his penis.
As he squeezed her sides with his front trotters Eric began thrusting, increasing his speed with each thrust.
"Oh my God" said Elle, "this is the best sex I've ever had!"
"Me too," said Eric breathlessly.
After several minutes, Eric felt a volcano building up inside him. Surrendering to his new form, he let loose and blasted what felt like a gallon of semen into Elle.
At the same time, Elle reached orgasm, feeling Eric's seed fill her.
As Eric collapsed on top of her, Elle came down from her high realizing that she may have just been impregnated, and may soon be carrying a litter of piglets.
"Oh well," she thought, "that's what they wanted us for."