Molly and Arthur had children: Bill, Charlie, Percy, identical twins Fred and George, Ron, and lastly Ginny

Molly knows that Ron is Single so molly picks up Ron's phone to see Ginny's best friend Lexie Zander as his lock screen

Molly: Ronald Weasley! What is this?

Ron: huh? What is what, mom?

Molly: why do you have your phone's lock screen as Ginny's best friend Lexie Zander?