Problem not solved, in my opinion. The second pedophile is already unable to molest children, and adding severity to punishment isn't as effective as adding immediacy or certainty.

The problem is solved by pairing those who wish to live longer at personal cost to themselves with virtuous pedophiles. The pedophiles get to have consensual intercourse with children capable of giving informed consent, and people willing to get turned into a child and get molested by a pedophile in return for being younger get that.