I tell my students you have an absolute right to write about people you know and love. You do. But the kicker is you have a responsibility to make the characters large enough that you will not have sinned against them.
“Education makes us more stupid than the brutes. A thousand voices call to us on every hand, but our ears are stopped with wisdom.”
“I love my mother dearly, but it wouldn't be suitable for me to live with her all the time.”