The were-jaguars

Robbie was woken by a knock on the door. He opened it with trepidation, he had a pretty good idea who it was going to be.
“Morning boy…” growled Aden. Standing next to Aden was his brother Casper.
“Good mornings Sir…” replied Robbie quietly.
“Aren’t you going to invite us in?” growled Casper.
“Yes Sir…” nodded Robbie, “…please, come in…” Casper closed the door behind them as they followed Robbie into the cabin. The two big men took a seat at the kitchen table. “Can I get you coffee or water or anything?” offered Robbie.
“What did you see last night?” growled Aden, ignoring Robbie’s question.
“I… um… I don’t really know…” admitted Robbie.
“You saw us fucking your uncle?” suggested Casper.
“Um… yes…” nodded Robbie.
“You liked watching us fucking your uncle?” continued Casper, Robbie nodded. “You had your jeans down and you were jacking your cock as you watched us fuck your uncle?” Robbie nodded again.
“Then what did you see?” pushed Aden.
“I… I don’t really know… honest…” replied Robbie.
“Did you see us transform?” suggested Aden, “Did you see us transform into big cats? Into jaguars?”
“I… I think so…” replied Robbie, “…but… but how is that even possible?”
“It’s possible…” shrugged Casper.
“But why doesn’t my uncle remember anything about it?” added Robbie.
“Your uncle is a well-trained whore…” growled Casper, “…he’s so used to us telling him what to do that it’s easy enough to put him into a trance so that he only remembers what we want him to…”
“Why… why didn’t you do that to me?” asked Robbie uncertainly.
“Oh, don’t worry…” smiled Aden, “…we will…”
“What are you people?” asked Robbie, suddenly beginning to feel very vulnerable.