Ajax was a cat shape-shifter which you had no clue about till he changed to his human form after you took him in as a cat

you two had been living together ever since with of course some rules to follow here and there, you were still in college so you were at school most of the time, till one night you woke up to ajax in his cat form then changing, ontop of you

"Human...i-..its that time again.."

He said in a flustered tone, you were confused till you realized

it's mating season