I'm currently in Bree's Maid path but she is stuck at 75% love and I'm wondering if it has something to do with the Home Harem or nah
nah, the Harem paths have nothing to do with any of the girls developments (except the minimum requirements for the girls to accept being in a Harem).
Go check the Wiki of Bree to see what are you missing to futher develop her love.
https://wiki.andrealphusgames.com/wiki/Bree
