YMLW-013 I never thought I would get an erection from my mother who is in her fifties! Seducing my son by showing off his irrational masturbation while drunk

I heard a distressed voice coming from the bedroom, so when I opened the door and looked in, my mom was masturbating! I never thought my lower body would react to seeing my mother naked! Will my mother be able to maintain her rationality when she learns that she is being used as an object of erotica?