Quite possibly your husband wasn't moving because of the phone call he recieved, and the group of people just walked around him and the rest of your family.
That's what I thought when I read it. If I approached a line and had no idea that someone was in line I would just get in the back of the moving part. For 11 people to enter there had to be quite a large space between him and the people in front of him.
I was wondering the same thing too. Sometimes people get caught up talking, whatever and just don't move, almost as if they are waiting for someone to catch up to them. OP said the line was in the street, therefore no queue area to confine people. If there was plenty of room to move around the husband while he was on his phone call (and the children) I can see people walking by. As OP said, her husband didn't notice them going by. Now to a child, it's black and white - the others cut in front. Maybe OP should remind her husband to keep up with the line. If someone was in the street (in line) and they stopped for a phone call, obviously oblivious to those around them and the wife had gone off to park the stroller, many might think either he was waiting for the wife or his phone call was more important or that he wasn't in line.
If I was behind him I would have asked him if he noticed the line was moving but then some people do not like to be interrupted on their cell phones. I actually have at times asked people if they are in line at some areas and they are NOT. Didn't even realize there was a line. Let's face it TSM is a known zoo. You can't miss a beat if you want to keep up with the line.
Why didn't the people OP was chatting with in front of her family say something to the hubby when the line moved without him and the kids? Did they possible think that he was stopping for the phone call or waiting for his wife to come back?
Why did the child not speak up while everyone was cutting in front but then was so vocal once the mom came back - vocal the rest of the wait? Did the child speak up and dad didn't hear because of the phone call or did child only speak up when mom came back, knowing dad wouldn't care but mom would? Or did child speak up AFTER mom came back and asked about all the people in front of them?
I do NOT agree with intentional line cutting but I am wondering if this scenario was possible in this situation since OP and hubby did not see what happened?
I realize this situation is different but we've had people give us dirty looks and make rude comments when we walked by them in the LEFT LINES of attractions that none of them realized were open. I'm sure in their minds we were doing something wrong when we weren't.
Why not give the so called line cutters the benefit of the doubt in this situation since we don't know exactly how it went down?
No offense but since OP was parking the stroller and her family was in line, maybe those behind considered that she was line cutting by catching up to her family?