Pennywise never knew he was capable of love. But when he met James' mother, that all changed. She gave birth to two children, one belonging to him (James) and the other belonging to Molten Freddy (Grace). They were separated from him for a long time and then he met the kids that would lead him to his son and James' sister once they thought they had destroyed him, his supposed last words being "Old habits die hard, but I'll be here forever."