Drill DIL Seducing Sin

He has a grey beard, but a lusty heart, they say. So what? Even if a man is a widower in his old age, why can't he hit on his offspring's new girlfriend? She looks perfect. No tattoos, no piercings, just pleasure packaged in a lush shape. If she spreads her slender legs in front of the man, can the man be blamed for it? The hero of this story had no doubts about the right answer... until he learned a terrible secret about this, let's say, girl...