I know that, but then Gran comes home and says "They make the girls work to pay off their debts for bringing them into the country. And they were going to force her to work as a prostitute too." That's sex trafficking, without a doubt. But that doesn't seem to upset Gran or MC. She reveals how horribly she's been treated and MC's reaction is "Oh no, how could the sex traffickers have treated her that way. She must have had a hard life. Oh well."The MC has met her several times, she worked the reception at the spa. He didn't know how she had been treated.
They need to call the police, not have a vulnerable girl work for them and spoil her with gifts to ingratiate themselves with her, in an almost predatory fashion!