I am a dragon

I spent five years in prison for performing a good deed, and upon my release, I faced endless disdainful glares. Thankfully, my cousin-in-law quietly stood by my side, and I slowly transformed my life, rising to a position of respect among others. Yet, I gradually uncovered that my cousin-in-law was harboring a secret that no one else was aware of, and this secret was intrinsically linked to me...