"...That was Dinky's father, as I'm sure you figured. His name is Ponet. I met him in Ponyville, some time after I moved here and got settled. He was... nice. A comfort, after Cloudsdale." She starts; I can tell it's hard for her to talk about this, but I keep a comforting hand on her hoof while she works through it. Derpy pauses now and then, as she figures out how to word it, or to listen for Dinky.