Deedee and her cousin Bunni took to each other immediately. There was a lot of chasing, wrestling, mouthplay, and even exuberant licking. Instant love. I think they could tell that they were related. After all, there were the striking similarities... specifically... peeping position. Note the identical rear leg lift.
And then the post-peep requisite begging ('mama? GIMME TREAT! I PEEPED!)