Parenting advice: While babysitting, my brother ignored my kid and locked himself in his bedroom

Care and Feeding is Slate’s parenting advice column. Have a question for Care and Feeding? Submit it here .

Dear Care and Feeding,

My husband and I have a 3-year-old son, “Adam,” and my brother, “Jason” has involved him in a very seedy situation. Jason works from home, while his wife “Beth” commutes to work out of town. Our childcare provider takes her mother to doctor’s appointments every other Friday, and Jason watches Adam for us when she can’t make it. Three weeks ago, I picked up Adam from my brother’s place. During the ride home, he complained about how my brother had spent the whole time time locked in the bedroom instead of playing with him. Then he told me that his uncle wasn’t alone.

Locked in the bedroom with Uncle Jason was “Aunt Delia,” who is Beth’s sister! I man