Bro, you can't play Call of Cthulhu outside during the day at a cafe table. The atmosphere is just wrong. And, akshully, the crawling chaos is Nyarlathotep, not Cthulhu.
So she could enjoy a book and some coffee? She can have a life outside of Darling. And about the rule that she has to be with her foster family when outside, she had a pass on her table that allowed her to be out.