its true that when doms get too backed up their balls will swell as much as possible to contain all the seed, but there's a point where u just can't keep it all in! sadly, some of that cum must come out one way or another, even if its just a few drops to help keep u back up for ur bitch
usually i wouldnt draw lori with big boobs, she's more of a giant dick and big ass kinda gal ;) but i dont mind drawing her boobilicious as a lil noncanon fun