When Millie came back from her one to one chat with Lillie, she was adamant that it was over with Liam... now we see her changing her mind as he professes how much he likes her.
When someone has been cheated on, some people are strong enough to walk away, others (like Millie) will be angry for a while but eventually get back with the person in question.
Does Millie know about the three-way kiss he had with Clarisse and Salma?
Or the other kisses he had with Lillie and Amy in the Truth or Dare game?
Or the lap dance he received from Lillie?
Millie would 100% be over with him
(again) if she saw these photos or watched the footage from Casa Amor.