I totally get the feeling that your mom is still trying to micromanage your life really. I get that feeling with my mom as well - even though I know she just wants to keep updated.

I like texting. It lets me communicate, but I don't get (as) upset when someone doesn't reply ASAP - because they might be busy. And if I don't want to reply right away... they have no way to know that I wasn't busy.

I found that if I initiate the messages with my mom when I do have the time... well, it goes easier. I can control the topic, and when I'm done I can say that I have to go do X.