Okay, first, Ijekiel is such a jerk
You don't say that out of nowhere! And he could've said that better!
"I'm in love with the princess" would suffice and will make Jeanette happier!!!
Imagine your big brother figure and your (not) sister getting together! She'd probably go "Then we'll be a big happy family!!!"
Instead he said that! No matter who it is, if you're told something like that you'll be hurt! Her freaking big brother just told her she's not important! "O-oh... I'm not as precious as my sister..."
If there's a catalyst for Jeanette turning evil, it would be this... THIS is the cause of envy that might take Jeanette over! I just hope Jeanette is positive enough to not fall to the dark side