The boys have obviously come back with injuries. People see Mac, black eye and a limp (or whatever), with Jack and they assume Jack is an abusive boyfriend. Cue people subtly telling Mac about domestic abuse hotlines and safe places, and people giving Jack dirty looks.
Whether Mac and Jack are an actual couple is to writer.
(As for why Jack over anyone else? He's the largest and most confrontational. People would be more likely to stereotype him as the abusive type compared to someone like Bozer who's friendly and less aggressive.)
When You Assume
People see Mac, black eye and a limp (or whatever), with Jack and they assume Jack is an abusive boyfriend.
Cue people subtly telling Mac about domestic abuse hotlines and safe places, and people giving Jack dirty looks.
Whether Mac and Jack are an actual couple is to writer.
(As for why Jack over anyone else? He's the largest and most confrontational. People would be more likely to stereotype him as the abusive type compared to someone like Bozer who's friendly and less aggressive.)