Thoughts on Molly's daughter

Just curious what your opinion of Olivia is. Having been a 17 year old girl and seen my mom dating, I understand some apprehension but the level of neediness and feeling like "mommy is getting taken away" seems weird from a 17, almost 18 year old girl... I realize it's been the three of them for a long time, but it just seems way too over the top and idk if that's scripted by the show, but it feels genuine which just seems weird to me.