Yes, I mean they're people, people with feelings, of course they can fall in love.
An old friend of mine who passed away in the 90s used to be a screenwriter lost family because of his alcoholism he also got fired from his job so he decided to go to Vegas to basically drink himself to death. In his time there he met a prostitute who he fell in love with. As most from her profession she had problems, her pimp was abusive but the thing is my friend didn't really have sex with her, he just wanted someone to keep him company. Over time they developed a bond, but he told her not to ask him to quit drinking and she accepted this. It was painful for her because she really did love him, despite his faults, their last moments together were amazing she told me, she accepted him for who he was and really did love him.