Honey, when during a blowjob I say "fill my stomach with your warm cum" .. I don't mean that literally!
Instead you start coming in my mouth so copiously that while I swallow it all with loud *gulps* I have to unbutton my shorts because my cum-filled belly is expanding more and more!
And you can't stop.. I change positions always keeping your cock in my mouth so as not to waste a single drop, while my belly contracts and expands.

When you've finally emptied, I look like a pregnant woman! I can no longer button my shorts.. now I can only wait to digest everything.