While giving my brother-in-law a titfuck, I realized how compatible we were. At first, I did it out of guilt—learning that he was suffering because of me made it impossible to refuse when he begged, "I can't do it myself, please help me feel better." I told myself it wasn't cheating as long as we didn't have actual sex. But as I took him between my breasts again and again, a desire began to stir inside me—the urge to have him inside me. Soon, new feelings emerged in our forbidden relationship.