Nightmare isn't exactly father of the millennium, but he still interacts with (or annoys) his three children from time to time. His first was Dreamqueen, born after Nightmare forced himself upon a succubus named Zhilla Char. Zhilla died in childbirth, but Dreamqueen retained all of her mother's memories and realized she could bend reality to her whims in her own realm. She got bored, however, and started messing with First Nations people in Canada in an effort to come to Earth. She later terrorized Alpha Flight, kidnapping the team into her own dimension.

Working through a mortal named Karl, Nightmare later impregnated a woman named Naomi. Upon understanding what Nightmare was, however, she fled and married a man named Jerry Ward, and they raised her son Terrance together. This, however, was all part of Nightmare's plan. Terrance grew up with the power to transform into someone's worst fear and eventually joined the Avengers Initiative as a counselor, helping super-powered people cope with their abilities. While Nightmare eventually possessed him, Terrance (now known as Trauma) was freed thanks to his patient, Penance. 

In an effort to gain revenge on the Hulk, Nightmare fathered Daydream by impregnating Betty Ross in one of her dreams. He then used Daydream to lure the Hulk into a series of illusions and nightmares. Daydream, however, turned against her father and went on to live "happily ever after." Aside from one brief appearance in the Nightmare Realm, she hasn't been seen since.

If you or anyone you know has been a victim of sexual assault, help is available. Visit the Rape, Abuse & Incest National Network website or contact RAINN's National Helpline at 1-800-656-HOPE (4673).