So I put the money in, and she sent the payment for the carpool. I texted something like this (maybe shouldn't have);

"Sorry for the confusion/delay. Like I mentioned I fell asleep after your text last night and after I came back from dropping kids wasn't feeling well and was in bed until I got to library.
Not my intention to withhold that or make you feel bad in any way. As I've said before, assume the best, not the worst. Like you told me the other day, I tell you, you know me"