Removed the pregnant tag. Going by the context of this and the associated picture, and also how it's tagged, her belly is swelled up because of how much milk was put in rectally. This is actually a fetish where a large amount of air/liquids are used to make them look pregnant.

Maybe it's just me, but putting milk up your ass doesn't sound like the healthiest of habits to do.

KaitoDies said:
Maybe it's just me, but putting milk up your ass doesn't sound like the healthiest of habits to do.

Just you. Sounds A-OK to me.