Sounds like Nampeung Kom?! I saw several versions of this lakorn!Don't think this one is on the list yet.
N'ek is the daughter of a wild woman. 20 years ago, her mother dated p'ek and left him. P'ek spent the last 20 years obsessed with revenge. P'ek is now rich and n'ek's mother is in debt so he bought n'ek for revenge.