Ah, I'm quite happy to see a third chapter in this series!
I must say...Every subsequent chapter just makes her seem more adorable. The gap between her usual self and being honest with herself during the 'dream' sessions is just great. Definitely can't wait for the next chapter!
Yes, though the maid followed shortly after. That chapter is in Michiking's book on this site. The maid captured the guy and got him to have sex with her mistress because the mistress was obsessed with him. The guy actually confesses to the maid and gets rejected and becomes the mistress's boyfriend, though the maid joins in the fun a few pages after her mistress. The mistress is fully aware her man is sleeping with the maid, but it is clear she doesn't know how often.
Regardless, the girlfriend deserves her own chapter, and a yandere chapter where she brings the maid back in line would be appropriate.
Also: "Turn Shion", I think we all know what this means. ( Í¡° ͜ʖ Í¡°)