I was playing social dubs today in a bubble. This bubble has curtains all around each court, and there is a cement curb at the bottom of the curtain behind both baselines. As you might imagine, the ball will sometimes rebound off of the cement curb and roll back into the court rather quickly. One player was what I would call a "quick server." If she missed her first serve, she would toss the ball before I even had time to shove the first ball under my skirt (!). One of the players was an "Obvious Fault Returner": Meaning she returned 100% of serves regardless of how far out the serve was. Anyway, my Quick-Serving partner was serving. She serves to the Obvious Fault Returner lady. The serve is an obvious fault, but the Obvious Fault Returner lady returns it anyway instead of catching it. My Quick-Serving partner pays no attention to where this ball goes. I turn around and remain facing my partner, watching to see where the ball is going. As she is in her service motion (with me still facing her), I see the ball rebound and roll toward her feet. While the serve is in the air, I call a let and said "Second serve." Obvious-Fault Returner lady returns the serve into the proper court. What is the correct resolution? First serve, second serve, double fault, point lost because my partner and I did not put the ball back into play because of the let call, or point lost due to hindrance?