I'm not saying this is probable. However, you say your 'scovies are 8 mo old and just started laying. I just had the same experience with my young Muscovy hens. My sweet pets, that always stayed close together, started to go their own ways. Then 1, days later 2, would spend time in their pen area. (They have an auto door and normally free range on a natural pond.) They were laying eggs which I collected most days. After a few more weeks they started sitting on their nests, only leaving to eat. Mind you, there's no drake around. The 2 would fan out their tails and kinda whimper when I'd pick up and set 'em aside just far enough to get their eggs. Another week and 1 began to hiss at me. Another week and those 2 would meet me outside their pen defensively, trying to sneak behind me and peck my boots. If I turned around, they'd scream as if I were a duck axe murderer as they ran away with their tails fanned out. They quit laying at 6-7 weeks and have slowly returned to being calm and oh so tame.
I'm still not certain, but I think my girls went broody and acted like they went thru a hormone change. Could Winona be broody?