Im thinking that maybe Lena made the whole trip with Roman up as she feels neglected by Yulia and wants it to seem like she will have a good day after all. Knowing Lena she is probaly somewhere sulking and just when Yulia gets up the courage! I only hope that Tanya dosent show up for the "party" and manipulate Yulia. Good job with the torture Vicky (lol)
Eidted to add: I think the song fits perfectly with what Yul is feeling and sometimes a song fits the situation better as it did here so no worries