At this stage, I wouldn't put it past him to be a brain-dead pony, only kept from dying by a little bit of magic. He'll probably die that very night, absolutely drained of love and life, and then thrown out with the trash.
But then again, I don't know the sexual capabilities of horses, or the physical effect of draining love.
i was actually thinking of the fact that he should have died of dehydration, semen is obvioulsy a liquid that needs a good quantity of water to be made besides my friends always told me that after the act itself they felt really thirsty and shit. i was refering to dehydration, and horses eyaculate a lot more sperm than a regular human
maybe when she snenses vitals going down she puts him in one of those chrysals? and waits to the recovery, i mean obviously changelings are biologicaly superior to the ponies so their "containment eggs" should be able to recover most physical trauma, exhaustion dehydration and unnutrition. i would expect to see SA body being in suspended animation in one of those eggs while his entire mind and body are forced to enter a shut down mod during the recovery only to wake up some time later to have a few seconds of free willed thinking just to enter her queens contro ones more and serve his duties as sex toy and puppet to deal with the princesses as well as probide vital information to ease the future large scaled invation that shall end the equestria that we know to turn it into a love farm or a slave farm