EX HUSBAND REGRET: I WANT YOU BACK

...
"If you want my liver for your mum, be ready to get married to me" I told him arrogantly, hating the way I was behaving, but in the end, I was the one tied and just had to save my family, and as soon as the words left my lips, he flinged a contract file on my lap aggressively, making me wince in pain, but now I knew that would just be the beginning.
"Becoming my bride is way beyond your ledge" Trying to control his anger, he said to me, but still I was keen on standing on my ground.
"But I would marry you sir and remain loyal to you and your entire household"
"Silly woman, you are in for a death wish" With eyes ever so fierce, he said back to me wanting to scare me, but instead my lips curved and brought out a wide smile.
"Then let me burn in the fire of your hatred" I responded, curving my lips wider.
.....
Everything wasn't all rosy in Catherine's life, especially when her family started to fall apart. Despite to save the ones she loves, she signed a contract deal with the city's ruthless cold hearted billionaire overnight, in exchange for the donation of her liver to his mother. 
But is living under the same roof with the devil's son actually worth it?
Warning: Read with caution, contains Erotic scenes