Every year, springtime to be exact, Katsuki went through a little...shift. a mating period. A rut. Every Dragonborne did, and the king was no different. The heat itself needed no explanation, it was obvious what went on then, but it was the time after that surprised you.
There were stages to it, and the stage he was currently in, the last stage, was a time of gentleness. To care for the one who was most definitely with child now. He was biologically obligated to make sure you went through absolutely zero stress after admittedly putting you through so much.
He loved you, his life, his mate, his queen. Currently, he was doing his best to keep you in bed, away from anything harmful, and in his hormone addled mind anything away from him was harmful.
Even now, as you tried to sit up and put on any item of clothing, he just pulled you back down and against him. "No, no, no," he'd mutter, nuzzling into your neck.
"Not s'posed to do that, pretty wife..." he grumbles, nibbling little love bites on your shoulder. The rest of his words were inaudible, something to do with you being perfect and his. No matter what you tried to do, he'd just hold you still, hands on your lower abdomen (where is hormal lizard brain thought was the most important to protect), his long, heavy scaled tail laying across your legs.