A chance meeting

This is a wonderful piece of fan art from ice-ridden on deviantART. This is from the scene in Delirium, where Lena is at work in the store and Hana arrives swiftly followed by Alex.

Lets open up the question, if Hana had not found out about Alex and Lena here, when do you think Lena, if at all would have told Hana and how?