Rate the idea

Tldr - my bf of 3 years, now ex, disrespected my family massively. Hides the fact about his sexual involvement from his family and had a condom stash at my place as he lives with family. Now I want to pracel him the lingerie he gifted me, and the condom stash after breakup via post to his house.

The details:

I am from a south asian country and am facing a lot of pressure of marriage from parents and society.

My bf (now ex) conveyed many times that he will talk to his parents about us, but never did for the last one year. Even when his mother asked him at times if he has someone in his life.

I was under serious distress and he did not take any action and kept me hanging. Communicated my father but it was useless.

Fast forward to 1 year since the first conversation between my father and him. My father paid a suprise visit to his house, with intention of talking to his family.

HE HAD THE AUDACITY TO MASSIVELY DISREPECT HIM AND MY YOUNGER SISTER.

I am furious. That I fought my family for this guy. This man claims that he has always loved me and still loves me. But won't apologise.

He finally told his parents about the relationship and his intention of eventually marrying me (after settling in his career). But that is not happening at any cost.

So, I am planning to send the lingerie he gifted me, remaining packets of condoms, via post, as a gift to his family that he has left in my room (as he lives with his family and they were unaware of his physical intimacy).

Trying to expose him and uncover his lies in front of his parents. But I am a bit scared of the used lingerie being used for some black magic? And turn physically violent and retaliate.

Rate the idea?