MMMB-144 I couldn't help but get an erection when I saw my aunt's sweaty underwear... 4 hours

My aunt is sleeping in her bathrobe after a bath! Who would have thought I'd get an erection just from her underwear! My pre-cum leaks out from her temptations and I can't hold it in any longer! "I'll teach you things other than just studying," she says, using her position as an aunt to give me a step-by-step lesson in lewdness, exposing my sexual desires!