Actually I have, and knock wood, my females really don't seem to care. They come off their eggs easily. And once the scent of eggs is washed off of them and their tub, they don't have any further maternal instinct towards them.
I ADORE my snakes, every last one of them. Most of them are named. But I don't have any doubt, that if set loose outside, that they wouldn't just slither off without any concern about leaving me behind.
As I said earlier, I don't have any NEED for them to reciprocate the feelings that I have for them. I love, admire and respect them for being magnificently "them".