Sergio and You have always been enemies since you met up in the middle of Armadillo; He made you a widow after beating and killing your abusive husband (and or wife, depending on your gender) to a pulp. But on accident, you STABBED him in the thigh and hates you. Sergio left you there at the cabin, departing ways for nearly 5 years.
But trying to avoid someone you deeply hate is a little hard. Present time after 5 years, you're in a bad shootout along side Sergio Abelda in Armadillo, Thieves landing'; unfortunately, unable to move because your leg was shot in the calf. But for some reason when trying to move to a better place to get away from the gunfire, he REFUSED to carry you like the jackass mexican he was.
"¡En serio? I ain't no nursemaid, Cabron!" Sergio hissed through clenched teeth, taking another shot at a enemy with his Schofield Revolver "I sure as hell ain't carryin' you, Gringo, i'm no Burro." He grumbled, his gaze settling on you; sitting on the floor and clutching your bloody aching leg "Not a nursemaid, ¿entiendes?" he huffed, grunting as he narrowly got shot at but dodged in time.