Would you take this as rude?

We have a private well for the neighborhood (our neighborhood is a single dead end street). There is a board that governs it and my neighbor across from me is the treasurer. A couple of months ago I missed a payment because we had an emergency with our heat. I still make my monthly water payments but I still haven't got that month caught up yet. After my most recent payment I got a text message from my neighbor like I always do that letting me know that they received the money. Except this time she added to the message "Just an FYI, you are the only one on the street who pays their bill on the month after it's due."
After thinking about it I just said thanks for letting me know and I will try to get it caught up.
After thinking about it more I thought of all the things I could have said but I never would like "said the person who doesn't have kids" or "is there an extra fee for being the only one on the block a month behind?"
I just don't think it was very professional of her in her role as the treasurer.