MTL - Shura’s Wrath - Chapter 65 Decisive choice (below)

Overnight, she was betrayed by her fiancé and sister, and was forced by her family to marry a fool. On the wedding day, everyone was waiting eagerly to laugh at her and see how she would get her foolish husband to put on the wedding ring. However, she took out her marriage certificate, which shocked the world, because the man on the certificate was not her ex-fiancé or that fool, but...

The young man Ye Tian obtains the ability to copy the talents of others and now fights against the heavens to change his fate. He struggles to survive and protect his sister from the apocalypse of the alien beast invasion. In order to become stronger, he begins to explore the unknown world and gradually reveals the secret behind the invasion of the alien dimensions…

A chance to change, to challenge destiny, making dreams a reality, and live a legend! A regular man gains a system that allows him to turn into a fish!

- Description from Novelupdates

She was forced by her husband and his mistress to jump into the sea and commit suicide, only to be rescued and taken care of by the jerk's uncle for seven years.