Yago: “I am such a good guy, just delicately holding my newborn baby brother….”
“...until I get bored and roll buddy off into the cushions. BA ha ha! Sucker! Can’t even lift your bald little head. Ha ha ha”
Río: “That wasn’t very nice, but I’ll forgive you, knowing what kind of trauma you have endured, just due to the fact I was born… (damn, spoilt, selfish firstborn)”
…but just so you know I mean business, here’s a fist to the face and a squirt of poop in your general direction.”
“…and I’ll close with an open mouth, sour goober kiss. Do not underestimate babies without hair or motor control. We have ways of making you beg for mercy!”
“Your farts don’t scare me kid. I’ll retaliate with a nose squish to the eyebrow and a shove back into the couch cushions….”
Repeat for the next 18 years.