Maybe he didn't "break in." Maybe they had things in common, running, jogging, religion, etc.
But then, if they knew each other somewhat, why would he need to go near the house, putting himself at risk? Most people who take advantage of kids or young teens are big cowards. They often pick victims who are in single-parent (yes, I mean single female parent) families, victims in whose life there is no ever-present male authority figure. These sleazeballs shake in their boots at the thought of getting caught and beaten to a pulp by the kid's dad. Not that Ed is exactly some big ex-Marine or something, but...she had a brother, too. And he'd have known that those males were in the house.
He wouldn't have cared if she left with nothing to explain it to her sister. Some molester guy wouldn't give a damn if the girl later got caught and got in trouble, he'd have just tried to disappear into the woodwork.
Why wouldn't he have arranged to have her meet him at some place her family would never guess?