Idea of Spending the Night

Last night, my husband, son and I spent the night at my parents' house because it was

a. too cold outside, with winds more than 50 miles per hour.
b. too late to go home (it was 12:30 a.m.).

The next day, my son woke up excited because he realized that he was still at grandma and grandpa's home. "Wow, daddy. I would like to spend the night again," my son tell his dad.

Dad: "Well, you can sleep tonight at your grandparents'."

Son: "What about you and mommy?"

Dad: "No. You would spend the night by alone at grandma and grandpa's."

Son: "No, that is ok. I want to sleep with you guys."