How to deal with a special situation

Daily I take both of my kids to school, well they both drive me and I try to teach them how to drive. I have to leave Arturo at 6:10 am where the bus pick him up, and then with Mauricio I have to drive to the other campus.

To avoid setbacks, we usually arrive to this site about 10 minutes earlier, and park on the side of the ridge that is perpendicular to the pick up area. One day, when Mauricio started the car and turn on the lights, at 6:10am, an automobile parked in front of us, and it will not allow us to move on to our next destination.

In addition to the parking action, suddenly the trunk opens from inside and a lady steps outside. I seized the moment to open my window and ask her if she was going to take a lot of time. Notoriously thwarted about my question, she answered that it will take her a lot of time, because she was going to take out her son's wheel chair and then help him to get into the bus.

At that moment, I realized that her activity will take her a lot of time, and that probably Mauricio and me will be late to the next site. So I have to ask her, please, that if she could move her car, because we were about to leave and we probably be late if we wait her.

She seem extremely odd, and probably a little upset from my lack of empathy to her situation, but she decided to move her car and we could leave without any problems.

In our way to the school, Mauricio and me had the following conversation:

-- Mom, the boy had a wheel chair

-- So?

--You should not ask her to move.

--You think that we should arrive late because one person who has this wheel chair?

At the end of the day, I asked Arturo how long did this boy has been using his wheel chair, and he told me that it was his first day. Neither the boy or us arrive late to our destiny. I also asked Arturo to be aware if this boy arrive to that site, that he should help him to unload the wheel chair or help the boy.

In your personal point of view, what you should do? I leave you with a map of the positions both cars had so you may figure the situation: