Rick gasped in shock, and placed his... no, her now oddly shaped hands against Charlie's barrel chest. "Come on Charlie, I'm Rick, your rider, remember?"
The pinto stopped a moment, then nuzzled rick, lapping at her ear while she shivered in mixed joy and fear. Her scent increased as her mare clit flexed with a popping sound. "Yes, you rode me. You also pleasured me like an Alpha mare should. Now, you are a mare."
Charlie rocked his hips to send the black shaft rubbing up and down her inner thighs. A nicker escaped Ricks lips as she grabbed his arms for support as her maresex grew wet. "Ohhh... Charlie, no.. I dont think I'm ready..."
In response, the stud nibbled down her neck to her teats, before flipping his lip up "your smell says different, R-Rick."
Rick moaned softly as Charlie continued the foreplay, making her weak in the hocks and making her realize how much she was attracted to him.
"How is this any different from sucking him off, anyway?" she wondered.
She relaxed and let him embrace her, supporting her as he angled his hips to slip inside. Rick squaled at feeling something so big enter her, then relaxed as her heat-soaked sex rippled around the organ.
learning as he went, Charlie soon cupped her rear, lifting Rick into a better position as Rick began to rock with him harder and harder. Her lust hazed mind wondered "Oh God, He's never lasted this long... is it the change?"
When she thought she was going to die from the pleasure of small orgasms, she felt a wave of pleasure build, answered by the sensation of Charlie's shafthead flaring deep within and a sudden swelling of his shaft. In moments, they climaxed together, neighing in greater bliss than any horse ever had before.
Soon, they were sitting on Charlie's saddle blanket as he groomed her, basking in the afterglow. Rick nickered sweetly and wondered "What now?"