Nightmares

My step son is 15 and has autism. He sometimes has nightmares and when he does he wants a cuddle with me or his dad or my daughter (his step sister). Lately he's been having a nightmare every night for almost 2 weeks. I don't mind comforting him and neither does my daughter. They are really close, but I do feel bad for him. Just curious if anyone had advice for nightmares. It would be greatly appreciated 😊❤