I'm thinking of arranging a marriage with my aunt
Why would you want to be married with your aunt?
I just need someone to keep and to take care of
It's good to want to care for others, but you shouldn't force anyone else into marriage just to make yourself feel needed.  Besides, it is wrong, and often illegal, to marry family members.
Oh, I didn't know it is illegal. By the way it worked out okay for me and we are happy together.
I feel like I need to report the wedding to the authorities as I have said, that's illegal. Even if you are happy with each other, it's not marriage that is legal and both of you may end up in jail. I do hope you file a divorce as soon as possible and find a different wife that is appropriate and not illegal to marry.