No — in Jainism, confessing a mistake does not by itself erase the karma caused by sexual misconduct, and there is no sexual union or marital meeting in heaven.

Strictly speaking:

• Souls may be in heaven according to their karma, but
• heavenly beings do not engage in sexual misconduct or ordinary human marriage, and
• meeting again is not guaranteed just because one person repents.

So the strict Jain answer is: repentance is good, but karma still has its own result.