I was thinking that Tia was nursing. Glad to find out for certain!
There was an article in TV Guide about DwtStars and there were a couple of quotes in there from her. I don't have them handy, but they were something like, "I gave birth without drugs, I can do this." and "I don't know what hurts worse, my breasts or my feet!"
Those aren't exact quotes, but they should be close.