HitStan tries to quit after getting a million like his pa asked (with spare for himself) and maybe returns home with said money.
Except... he is struggling to quit.
Old enemies follow him left and right so he's taking down people while trying to play his ordinary Stan-sona, helping out his ma and being a better son (in the end he never truly could be himself because what if he got kicked out again? Does he even know who he is anymore? So many identities... so many personalities... je just has to pretend to be a good son-), reconciling with Stanford and connecting with Shermie...
Also not to mention the odd habits he has gathered from being a hitman, being scary and intimidating unintentionally or even watching his family sleep and rounding the house like a guard dog before 'sleeping' in bed...
His family definitely notices but I think itd be hilarious if they're all too awkward to bring it up. Even more hilarious if Stan thinks they never truly accepted him, especially his father (who is absolutely shitting his pants because of Stan).