Maybe she's half whatever this little cat weirdos are.
Which means somebody fucked one.
I can't post pictures in comments, so please consider that : - someone probably fucked a calicot or whatever they're called in English, felyne or miqo'tes or whatever, - she's human-sized, meaning the calicot fucked a human woman, - cats have barbed dicks (I learned that in Morrowind as a kid).