Surrounded by moans, not only her abs, but her body started to change.
Her fragile and thin arms started to get bigger and bigger until they doubled in size and than more and more defined.
Same for her shoulders that started to get more bulky and wide.
Her formely flat chest was now at least few sizes bigger.
As for trying to adjust to her new physique, her body gained at least 10 cm in height too.
"Anf anf... That was incredible, I never felt so strong and full of energy.
I can believe I asborbed so much energy that made my body change too.
And..." She started to touch her well defined abs "I can feel that my body have only absobed maybe half of your semen".
But as she was talking, the man's vision started to get blurrier.
"What's wrong? Maybe this was a bit too much for a virgin like you. It's pretty common for man to collapse after having sex with stronger succubi, but never happened to someone like me, you must be a real wussy.
So bad, you will miss the best part, I can feel my body is ready to absorb the rest.
AH! Here it comes!"
But just as she started to moan again, the man lost consciousness.