You can go on a date with her then choose to blackmail her, it will lead on a corruption level mechanics, but as far I tried, things seems to stop where she will got a breakdown of your actions without you could interact with her into the Occult Club (Tried all possible options you've to make her accept you dispose of her. But the level of Corruption thing seems to be reliant only before you invite her into the Occult Club.)
A Walkthrough about Meiko paths would be greatly apprecied to get some understanding about how is it excepted to go from your choices (and if all those choices aren't pointless while her store goes further)