During the scene where Jane and Ricky were talking about killing Lester in American Beauty, Ricky zoomed into Jane's eyes. I understood this as a sign, that Jane was not actually joking about killing her father.
Do you think Ricky told his father, that him and Lester had sex, just because he knew that he would be pissed off and kill him? This would make sense, because Ricky was so obsessed with Jane and he knew she wanted Lester dead.