Petty. Extremely petty

But momma you've seen it before! I just thought you might want to see how much I've progressed! I'm not even in final form yet!

You probably wouldn't want to see the final form seeing how it'd be old and wrinkley.

and possibly (probably) grey.

Borderline??? It is cheating

It is but if he deletes the messages you can't call him out on that. It's obviously cheating but taking action without solid proof may make you lose credibility, only over some stupid butthole.