That's exactly why i really don't care if she's pissed that the MC chooses Moonsong as his first, it's pure hypocrisy on her part. MC should stay virgin for her while she is specifically seeking out people she expects to get fucked so she can experience it.
I mean, should one be happy to hear that she wanted to experience geting fucked by x amount of people just so her first time with the MC is good
...and it not being her real body changes little imo.
I really liked her character until that part and how she does that for 2 years, after that i put her on the reject list, also unlikely that she will stop using her powers on others, which is still cheating territory imo ¯\_(ツ)_/¯