I think I'm ovulating - I can feel that familiar little twinge on one side, and the familiar EWCM that I was trained to look for.
And even now, with two little babies at home, and the knowledge that any kind of natural pregnancy would be impossible, and also knowing that even though I would like to try again at some point now is really not the time... But still my brain kicks into automatic TTC mode. and I think - well, I'm ovulating, so I guess we better try tonight. It's automatic.
And it's just so strange - that after all that, the years of trying just created this habit that I can't break.