May I know, exactly, how I ended up with Fiona?
When you first met her, you should have had the option to start her route of not, and it's pretty clear, like saying you like gingers or not.
Basically, if you never had a scene in the back of the bar with her you shouldn't have had a scene this update, but if you did then you earlier said you were okay with her content.
Most of the girl (other than the six/seven unavoidable main girls) you make the choice when you first see them if you are into them or not. Then later on most have additional chance to drop their route after that first moment too. Fiona has like three leading up to the scene in this latest update I think so you shouldn't have even been able to stumble on it because you made like three choices leading up to it in earlier updates... or your game is bugged, and you need a clean save anyway or more problems will arise as more content comes out.