I wrote this when I was half asleep so it's a bit weird. Enjoy!
You and Shoto laid in bed together. You drifted off to slip long before him, as he was prone to insomnia and restlessness. He heard a kid gurgle come from your stomach.
Wow they look so bloated, he thought as you let out a disgruntled whine. Maybe I can soothe them a bit. He pulled you into a spooning position and began rubbing your belly with his large warm hand. He felt your body tense up against his. Oh no am I making it worse, he thought. Suddenly he heard a short brassy sound escape your lower half. He felt a powerful vibration followed by a sick warmth.
Ack did they just- his train of thought was interrupted by two more short powerful farts. These had a rotten and sickly sweet smell to them. Normally he would try to put some distance between the two of you but instead he held you even tighter.
Poor baby. Telling by how vile your gas was, he could only Imagine the discomfort you were in. He squeezed you hard, coxing a lengthy spluttering wet fart out of you. A thick foul smell filled the air. He could have sworn the air felt physically denser. You released three more of the juiciest farts he'd ever heard, each one vibrating on his crotch. The last one jostled you awake
"What's that terrible smell.. Shoto did you pass gas" "Y-yea sorry "he said to avoid embarrasing you.
You shook your head "Gross"