There's every chance she will, I've been late by a couple days before. My cycle seems to be between 25-28 days (currently on day 28).
Not particularly TTC but taking the 'natural' family planning route. We rarely have sex anyway, but DTD a couple weeks ago and according to the app I use I wasn't in a fertile period - but only JUST.
We have a DD who is nearly 2. She still doesn't sleep through the night and I still bf back to sleep when she wakes (not during the day anymore).
Not sure if I will be delighted or devastated if AF appears. Was wanting a slightly bigger age gap - but we would cope.