that's perfect i'd say. what i had in mind was a half-brother situation but it could easily be full siblings with a tiny bit of tweaking on his background but basically lucas' mother became a serial monogamist after his father came in and broke her down (he was a gang member and is currently in jail for attempted murder and possession with intent to sell heroin), half-assing her job as a single mother while jumping from terrible boyfriend to terrible boyfriend while her parents did their best to make sure they didn't get TOO fucked up. didn't really work until lucas was thrown in juvie for assault, but even if he straightened up a little and became a mortician, he's still an absolutely chaotic hot mess