Once Aster felt his sister's body was getting used to him, he was about to slowly start moving but Alice stopped him.
"I… want you to push it all the way in, if mom can take it, I can do it too".
Aster sighed, now that his penis was way bigger than before… he reached places he couldn't before, one night when he was making love to Lilia, he accidentally trusted harder than what he wanted to and the result was that the tip of his thing kissed the entrance of his mother's womb.
Unlike what he thought, instead of harming Lilia she had the wildest climax of her life, but as expected it was a bit hard to reach such a place, so it required some "training" to do it, something the both of them were happy to do.