It's true, but that's not even the worst of it. Lucy's family owed money to the mafia and she was going to be forced into prostitution until Steel married her for the purely platonic reason of saving her from that life. Doesn't stop creeps like Mountain Tim from hitting on her, though. Funny Valentine is a slightly more complex case since Lucy was originally disguised as Valentine's wife who she helped kill in order to kill him. Sex was basically his ploy to unmask her. Also, it is the 1800's and he is a powerful man, so it's somewhat realistic, all in all. Doesn't make it any less awful, of course.

Also after doing a bit of research, "In the United States in the 1890s (when SBR is set), several states had an age of consent as low as 10"