Except that after the concert is the Cathy event and meeting up with Liam.
And there's still a chance Ellie will make it to the concert. She's enthusiastic during the morning shower. And I believe if she is, she's bringing a "friend". So we might see the return of one of Ellie's dance friends like Christine
Cathy is the one getting married right? so the one who was making eyes towards Liam when trying on a wedding dress in front of Liam.
Not saying it would but maybe a scenario happens where Sophia isn't able to meet Cathy and Liam then takes Sophia's place.
Regarding the concert, I don't know what to expect really, I figure it's more likely nothing happens at the concert but Sophia is more attracted to Sam after, we know Sophia likes musicians, so follow up on that I think is more likely. Then I think Sophia will notice Cathy and Liam acting differently together later.
Personally, I love to see Cathy and Liam pushed together, and it leads to an open marriage between Liam and Sophia, that would be unexpected and I think it would open up a lot of doors without harming their marriage.
The only thing potentially sexy that could happen is between Ellie and her friend, who I think could be Julia?
Unless Sam spies on Sophia after she returns home later and Sophia lets him, you figure the seeing Sophia in her bra on the balcony, and spying on her at the pool from his treehouse will maybe go somewhere.