Thanks for the link.
The facial expressions of the father are difficult to interpret, since he already has a mean face. He's facing Josy's bed in these shots and looking at it.
But the facial expressions don't show anger. On the opposite. Rather a kind of satisfaction, relief or positive confirmation.
Theory
What if the father told Maya that he would not release the money until Maya proved that she was not a lesbian or in a relationship with a man?
After the MC's first visit to the Pink Rose, Maya's note hints at what happened.
What if Maya, with the help of Derek, faked pictures to frame the father?
But now the father didn't believe the bait. At the end of EP3, Derek comes to the Maya/MC dorm room and talks to Maya while the MC waits in the hallway.
What if Derek told Maya that the father is still skeptical?
What if Derek convinces Maya to have real sex with MC?
Maybe Derek and Maya decided to show or send proof to the father?
Because of the intimate moment between the two, Maya starts to have doubts about the plan, because she realizes that there is more between her and MC and she doesn't want to jeopardize that. Maya says the following just before Josy knocks on the door. That Derek has confirmed something she always suspected and that she doesn't believe her father's lies anymore, hence her decision to complete the list.
I doubt Maya will send the video to her father. But there are two people who might have. Derek knows about the video and Josy learns about the video later and both have Maya's trust. They could get their hands on Maya's cell phone.
And now the affinity comes into play.
If MC is CHICK he will forgive and if he is DIK he will overreact.
And all because I interpreted the facial expressions!