If he held back just a little more, perhaps Glen would be able to control himself to a much better degree. However, the temptation given by Etien he really could not resist.
Etien's kiss feels so sweet, but when he has to remember that this mouth was once crammed with a nasty dick by a fucking Duke, it makes Glen feel like he has to erase those traces from there.
Perhaps the aphrodisiac effect that suppressed Etien's nerves, making the Duke, who had always looked so arrogant because he ruled the coldest, most powerful, and most unshakable land in Aethaarion, now looked very tired, even every little touch given by Glen was able to make Etien moan with a sigh that sounded very loud. And every scrumptious moan bounced out of the Duke's mouth, it made its own distinct stimulus to Glen.
"You're getting out of control, Duke Etien...." Glen put his palm on the Duke's forehead, getting rid of the sweat and part of the hair that almost covered his eyes.