Sister-in-law vs Driveway

What’s the difference between my sister-in-law and a driveway?

I pull out of the driveway.

Difference
Driveway
Sex
Innuendo
Infidelity
Family Relationship

Explanation

Explain Bear

Listen up, simpleton. The joke is about sex. He pulls his car out of the driveway, but he does not pull out of his sister-in-law. You probably still live in your mom's basement and do not even have a driveway to pull out of. Based.