What do you call it when someone reminds you of your ingratitude?

Adopted mother: 'Your parents died. I took you in. If I knew you'd steal from me, I would have left you to the State.'

Mother: 'If only I knew you'd turn out like this, I would have had an abortion.'

I believe that's called "guilt tripping" someone.

"Guilt trip"

VERB

1. make (someone) feel guilty, especially in order to induce them to do something:

   Ex. "a pay increase will not guilt-trip them into improvements."

   (Source: Oxford Dictionaries)

Shame (dictionary.com)

n. the painful feeling arising from the consciousness of something dishonorable, improper, ridiculous, etc.

In the example above, however, the mothers are using the verb

Shaming

v. to cause to feel shame; make ashamed