Oh hey, sup London. I'm a 40 minute train ride from you!
I think the main problem is that Yukki CANNOT shake Yuno. Hell, look at the stunt she pulled in 27. Even after a good old slap and a telling off bitch still runs back axe in hand screaming about how she wants Yukki.
Hell, I think no matter how much she hates her, she'll stick to him like glue.
Remember guys, she was never sane to begin with, why would she get a clue after a slap?