I've read a lot of thoughtful and crazy theories about the way forward with Morello. Here's another crazy speculation.
When Liam and Sophia visit, Morello confirms that Sophia has fulfilled the task of the brothers to the fullest satisfaction.
Larry was enthusiastic (no wonder!).
But he (Morello) cannot afford to go without money because of a woman, it would make him look weak. With her convincing commitment, Sophia would have made it possible for him to make them an offer.
Instead of breaking Liam's legs and taking everything away from them immediately, he would now see the gambling debt as a kind of bank loan. And they could negotiate the term, repayment installments and special repayment installments / terms.
Morello occasionally makes Sophia the offer to work for him or to fulfill tasks. He makes it clear that the fulfillment of the tasks would be voluntary (no extortion!), since Sophia has already done her part of the debt settlement, and only the possibility would offer Liam's debts faster.
These tasks do not necessarily have to be of a sexual nature. Perhaps she needs someone skilled in martial arts to complete some of these tasks !? And Sophia could use the payment to reduce her debts or to become financially more independent from Liam.
But if I wrote the script it would definitely be one of the tasks. Namely the wish to get Larry's pictures of Sophia as an underwear model. And she already has an experienced photographer at home
.