Okay. So when we first meet Isobel, she’s taking Zoe’s photo. In front of a portrait of herself, naturally.
And naturally, she must get just the right angle on it all. For Zoe's sake.
When we last see Isobel, she’s taking Zoe’s picture again, in front of another potrait of herself. Only this time Zoe’s in her sparkly catsuit, and her pose is, well, different.
Isobel checks her hair while Zoe’s back is turned. She must look her best while she's flirting! But Zoe catches her at it!
Isobel keeps her cool, though.
“Tell me, Zoe, are you really good at maths?”
“Oh, yes, Isobel. I’m ever so good at it.”
(Well give me a break. There has to something going on here.)