This is scandalous because she is still married to the Englishman. However, her own matrimonial ties do not stop her from threatening Bolivar should he dare to have an indiscretion.
-Feeling his swelling press against me, I said, "Simon Bolivar, you listen to me, senor, Liberator or not, if I find out you're making love to other women, I will get to Guayaquil before you know it and"-I squeezed his member-"I will cut this off, pickle it, and send it as a present to King Ferdinand."
Don't let her picture fool you. This is not a docile woman. She even holds a pistol on a visitor in her parlor and gives him five seconds to get out of her sight.
The story is told from her viewpoint and the viewpoints of her slaves. I think the entire story could have been told from Manuela's POV alone, but the effect in the end tied up rather well.