Plot consistency: You call her and share much mirth over her devious suggestion. You decide to go on a date choosing your actual favourite vegetarian restaurant as the location followed by a nice walk afterwards through one of Prague's beautiful parks. She's not overly keen on vegetarian dishes but gives you the time of day because you're nice, and picking up the bill. Everything is going great and 2 more dates in she invites you back to her place. She's busy freshening up and you take it upon yourself to make some coffee for you both. That's when it hits you. She keeps the ketchup in the fridge. It's all over. You make a quick escape leaving a hastily scribbled note attached to the bottle, "I live in the cupboard".
Not the end.