I also want to chime in with gratitude for adding a female Addison option. Sincerely, thank you for doing that!
Speaking on Addison, if you're looking for a way to give her two routes like the other sisters, I think you've already set it up quite well: have her engage in sleep creep (as opposed to the MC doing it, which would be a refreshing twist). As she gets more accustomed to having her way with the MC while he's "sleeping," the MC could eventually "wake up" and catch her when she gets too daring (not content with stuffing his fingers inside or dry humping over the clothes anymore, she's about to go all the way). Then the player has the option: allow her to use the MC as she likes, or show her what it feels like to be used. First route is femdom, where she grows increasingly bolder with when and where and how she uses her sex toy big brother. Second route is maledom, where big brother grows increasingly bolder with when and where and how he uses her.
If Clarissa is "bratty dom" and "teasing" - which I take to mean spoiled princess domination with flashing and rubbing to secure control (very exciting! I hope she adores giving the MC views down her top and down her pants only to "catch" him peeking and force him to do something more for her pleasure as "deserved" punishment) - and Jessie is humiliation (I hope to the point of outright servitude to the couple with mockery and perhaps forced to be their cameraman and cleaner), with the Mom being the cruel goddess worship and the aunt being the overpowering amazon queen, I think Addison slipping into a role where she views the MC as the only one in the house she can truly call her own (a sort of possessive and explorative ownership that builds her confidence) carves out a unique niche for her on the femdom side. As for her maledom side, you seem to already have an idea of what you want to do with that, so I don't want to impose too much. But "humiliation" and "petplay" still align with what I proposed above - objectification (in a power fantasy sort of style, like "You are mine. My plaything.").
I believe I read harem was on the table? If so, I propose you could accomplish that on the femdom side by making it the mother's idea - basically, she assigns the MC to be the house servant, and if you embrace the role you are forced to the bottom of the social hierarchy of the house. If you really want to lean into the cuckold aspect, on that route Damian could become the man of the house (Clarissa already seems quite interested in him, for example). On the flip side, the maledom mc naturally aims to become master of the house and could work to kick Damian out or force him into servitude (and chastity, because no servant touches the harem king's stuff, dammit!).
Regardless, thanks again for making a female Addison option and I hope you have fun making your game! Looking forward to seeing where this goes, please don't let anyone get you down. Best of luck!