I have just walked into the bathroom with my boxers in my hand and walk straight in on my sister a year younger than me (f18) with 2 fingers in her pussy she was sat on the toilet I think she must have been listening to me and our mum as she wasn’t watching anything she instantly jumped as soon as I walked in and just stared down at my cock

i wasn’t hard at this point as I had just emptied my balls in my mum but seeing her certainly started to change that she was butt naked legs spread around the edges of the toilet seat she looks up at my face and asked me what all the noise next door was she was completely avoiding the fact that I had just seen her touching her self and that we were both completely naked I tell her I don’t know what she was on about that’s when she turns on her phone and shows me a picture

A picture of me whilst I was fucking our mum like 30 minuets ago I’m now shitting my self again wondering what I can do to make sure no one else ever knows and see this so I ask her what I can do for her to delete it and forget it ever happened but of course like all younger sisters she was stubborn as hell and just told me she was keeping the picture at this point I’m scared for what my dad will do when he finds out or worse if my girlfriend sees it

I beg her to not show anyone or tell anyone about it she just said “ok” and I told her I was going back to bed she stays silent until I turn around and says have fun in the strangest seductive voice I continue on my way to go back to my room

I am still butt naked my mind whizzing about what she could have meant by have fun and as I turn the corridor to my room my aunt steps out dazed from her sleep and walks straight into me as we get to the corner at first she just said sorry she obviously didn’t realise I was naked until she realised I was getting a boner and I’m not surprised I did she has the sexiest most perfect pair of boobs on the planet and she sleeps in just her panties so they were out and looking hotter than ever as soon as she realised I was getting a boner she asked me what the hell I was doing walking around naked I stay complete silent eyes fixed on her boobs I honestly couldn’t take my eyes off her I eventually reply and ask her the same question she answered instantly saying she thought everyone would be asleep now that I’m horny again I’m losing my self control again and ask her if she’s lonely

My aunt has recently had a divorce when she found out my uncle had cheated on her she replied saying that she was and missed him I looked up at her face somehow getting my eyes away from her boobs and realise she has her eyes set on my dick and as I’m uncontrollably horny again from seeing that aunt I’ve jerked off to so many times half naked in front of me so of course I do the stupidest thing ever and ask if she likes what she sees.

Before she has the chance to answer my sister walks up behind me with only her underwear on as well she notices that I’m rock hard and instantly tells me to cover up and tells me to come to her room we need to talk I’m now hard as fuck and scared as fuck she still has that photo and now she has seen me rock hard with my aunt half naked if anyone was to know about this my life would be over

Part 3? Sorry this part didn’t have that much sexual content as part one I just wanted to go into more detail