«If Dad Only Knew 2» by Laura Lovecraft

This anthology features three hot stories of mothers and sons who won't let a little thing like Dad being around stop them from getting what they want; each other! Stories include. 

Box Lunch — Emily brings her son something sweet to eat.

Mom Phones It In — Dad's call interrupts Austin and his mom having sex. Or does it? 
This Could Have Been You — Keith takes advantage of his dad's bad behavior.