She's really an understanding person for her to have not escalated the issue.
Apologizing is a magic word that has the effect of melting hearts and just like you, I don't waste time in saying sorry to any one I might have offended. I also learn from my errors not to repeat the same offense at least consciously on my part.
Apologizing doesn't cost much neither does it deplete any thing from us rather it makes us the bigger person.