Summertime — Curtiss Ann Matlock

And the living was easy. Or should have been. But Oren Breen couldn't keep his mind off Lorena Venable, his landlady--and next-door neighbor. He couldn't forget that she was upstairs, behind the lit window of her bedroom--or that he'd like to be there, too.

Lorena knew she ought to forget about Oren. So long as he paid his rent on time, why should she care what he got up to--or with whom? Why, he was young enough to be her ... lover? Now, where had that thought come from? And what was she going to do about it?