"She wasn't a prostitute, Alec," Andrew said, tone only vaguely reprimanding. He had, of course, helped her pay her rent, so maybe she was a paid lady friend, but he chose not to see it that way.

"In any case, Jack is... young and confused. I'd appreciate it if you'd talk to him."

In other words, he wanted to provide Jack with a perspective that wasn't simply sudden new father figure, which could be intimidating.