[COM] Leo Gulp (Patreon)

I'm not really taking commissions quite yet (more on that later though), but I was convinced by a friend to take this one on real quick.  Just Leo gulping down...Rivin I believe?  Well, he's a belly bulge mostly so it's hard to tell~

Leo (c) https://www.furaffinity.net/user/thetwfz/

Rivin (c) https://www.furaffinity.net/user/rivin2e