What surprising thing does Cleopatra do after Tully successfully guides the dinghy through the Mayan cut?

After Tully successfully guides Cleopatra's dinghy through the Mayan cut with the help of torches and Hector in the tower, she tells him that she is going to sail the Lucretia through the natural channel. Tully assumed that she would take the schooner through the man made channel, the way she came in. He is a little nervous about guiding the large boat through the Mayan cut.