Here are the sketches for pages 12 and 13 of Chain Reaction. Julie makes it clear they're both enjoying themselves, but when reinforcing her intentions leaves Alex again facing uncertainty, she makes one final argument.
I started this as one page, and when nearly complete, I felt there was something missing, and so I tried adding more. As I felt it wasn't really fitting into one, I started on a second page to piece it all together without having to resort to any cramming. For this reason I didn't upload either page first, as I finished both at about the same time.