I haven't played this part properly, so I can't pinpoint the exact spot.
If Sofia took a bath alone, where did Sofia's motivation come from to wear a see-through gown and take off bra for strangers the next morning?
If you mean the part where Sophia took a bath with Dylan, she thought she had sent the wrong signal to Dylan and she tried to talk to him to correct it. (maybe)
Of course, she felt some emotions through her conversation with Dylan, but I don't think it was significant enough to lead to her see-through outfit the next day.
If it led to a jacuzzi, she was definitely displeased at the end.
Just as Dylan (Club) suddenly became a different person, Sophia suddenly became a different person.
Even if a mother receives a declaration of love from her son, does it make sense for the mother to act like, "My son thinks of me as a women. If anyone rings the doorbell, I'm going to show him my breasts and seduce him."?
I hope the developer has another reason ready.