I've met the mom before she's always a cheerful person, although I have no special memories or association to the mom. As soon as the family makes the speech, and I hear the crackle in their voice,

I couldn't stop from tearing

and after the speech the son had a brief emotional moment, for some reason I got emotional as well. I keep on thinking to myself, it's not my loved ones and not my family, why am I so worked up for.

because you have compassion, capacity to feel for others. Nice quality though not always easy.