Haha, she's not gagged--she's in mourning. It's a 1546 woodcut, the year Martin Luther died, and the headline is roughly "Katharina, wife of Dr. Martin: Luther's left-behind wife pictured in her sadness."

I can't read the text passage entirely; too many of the words are too blurry. But it seems like some kind of prayer for a person whose spouse has just died.