I met up with my aunt who came to take care of me while my parents were away on a trip. We exchanged the usual "You've grown up so much," but there was something different about the look in the eyes and smiles of the two aunties... The temptation of thin clothing and tight asses in the hot summer, the blue sky, outdoor bathing, watermelon, and boobs. My nephew's healthy cock made my libido explode, and my super sex machine went wild! Because we're sisters, we were able to work together so well that we led him to an ejaculation collapse, and taught him the best adult sex until his sperm dried up. My aunties are sex geniuses and professional-level sluts, sex monsters! Vulgar sex is the best!