It's not that bad to get jealous and it's also longing too cause in her past life she didn't get any love. And this current life, yeah, she experienced love except the experience of being loved by your mom and also she didn't even get to meet her mom because her mom died. Adulting doesn't mean you don't have rights to get jealous of someone getting loved by her mom. I think that scene was about her probably longing and wanting to experience to get loved by her mom.
ur thinking that shes taking it away. She,herself, feels awful for wanting that affection despite having so much. But its honestly, true: nothing can replace a parents affection. Maybe you've grown up with both parents, but it hurts for single parent household children to see what they could've had.

pink haired baby freak should die idc this little hoe is a grown ass woman inside of a child and she's jealous because another kid is getting attention from his own mom??? bitch go away
i really do not like the mc i kept hoping it would get better but she just got more and more annoying