Smart FMC please with obsessed MMC

Looking for a smart FMC. Someone who is independent and strong. Aloof.

I don't want her to be too nice or soft.

Too many FMCs in dark romance are easily manipulated and get tricked so easily (go places they know they shouldn't be/blackmailed with stuff that isn't a big deal/helping a "friend" who ends up helping the MMC to hurt her/miss out on obvious signs and red flags)

MMC is obsessed and has to WORK to get her.

Non-con/Dub-con are fine, but please no age gap or incest.

Love step brother and RH.