AITA for messaging my friend mid ranked after his mom kicked him out and saying for him to come back?

ok, let me explain first, we were playing an ranked game, and sudently my friend gets muted, then he exits, i myself didnt know anything so i sent an 'come back now or im gonna mo**st you', at the time i was just joking sinse i got desperate since it was ranked, after some days, i get called to the principal, he said i threatened sexualy an student (my friend) and that his mom got pissed and wanted the school to do something, i explained, he explained and we got scot free.

Yet today, (02/09/2025), my mom got called in, and what do you think? well, his mom wanted an response, and it probally wasn't what she wanted to hear from the school. since the day i got called in they probally said it got resolved and no parents was called in, and it was the 'no parents was called' part that she probally got pissed and called the school again.

So im here, on my room, waiting for my mom to come back, im pissed at my friends mom but i know i fucked up by saying that. Am i the Asshole?