"And when he is alone with his children ..."

Ibn Aqeel said:

"When the wise man is alone with his wives, he should then leave his intellect in a corner as a respected shaykh and (start) joking and fooling around with them to give them and their souls it's rights. And when he is alone with his children, then he should come to them in their shape."

["Aadaab ush-Sharee'ah", 3/388].