A little late update, my apologies! I was a busy busy bee putting my finished (nsfw) Harlivy fancomic up on itch.io (<- clickedy click on link if curious! It's 20 pages of harley quinn and poison ivy being horny, in the Harley Quinn: Animated Series setting, tee hee)
Now on Lillian being horny... I liked that she realizes as the relationship grows that she also has a certain... upper hand, if she wishes it, in their sensual interactions. She's indeed a little taller, and seeing Roomie vulnerable let's her discover other parts of her she never thought she had. Like touching butts while your girlfriend is crying now's not the time Lillian!!
(or is it?)