Couldn't play again until the evening, but you were both right! I could already go to Liora's garden, but I failed to notice the prompt when I beat Maeve and I didn't know I had to press Z to open her door. I already love her more than Maeve myself based on her intro (partly because I have a huge fetish for worshipping women wearing 18th/19th century dresses and shoes, which is done extremely rarely and her attire is loosely inspired by, but she's definitely a charming mistress as well based on the first interaction), but I still have to see if the fights and submission scenes are as good as Maeve's or not.