It was trial and error for me. There were times she would send me pictures of the girls and I would respond by saying "Thanks". Other times she would send me stuff like, "I am on my way", and I wouldn't respond.
You can respond with a "Thanks" and see what happens. It won't make or break your sitch. The only concern I have for you is your ability to not read into anything if she does not respond back or if she is nice to you. If you can't emotionally handle it yet then don't respond.
I was more strict early on with not replying but you have to remember that I had no OM in the picture. It was always kind of uncomfortable to me never saying anything so I tended to mix it up.
Now that we are D'd, I do respond to her texts especially if they are about the girls. If it is just informational a lot of times I just respond with a "K" or "TY".
Any indepth convo's are done via email or when we see each other in person.
