For the Transformed series of gender swap books I wrote one called Transformed Into a Cougar, which is about a guy who becomes a middle-aged woman who searches for young guys to fuck, not the big cat. In the Sims 4, here was my first cougar:
And then some months later, here's what I consider an improved version:
The main differences being pants instead of a skirt, no glasses, and less tan skin, though that was just kind of an oversight. I liked the tanned skin for a kind of Jersey Shore look but oh well. The leopard print is a little sharper in the second one. Sure, leopards aren't cougars, but it's all big cats, right?