Should I tell my grandparents (my legal guardians) that I had my first kiss?

I just got back from a school dance, and before I left, my friend group made a bet that me and the guy I have a crush on would kiss by the end of the night. I decided to kiss him, with his consent. After telling my dad on the phone, he is giving me 2 weeks to tell my grandparents that I had my first kiss. What should I even do about this situation? My grandparents know this friend of mine, and I don't think they'll let us hang out anymore after they figure out that I kissed him.

Should I tell my grandparents (my legal guardians) that I had my first kiss?
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