My milf cousin caught me masturbating

my milf cousin wants to use the faster wifi at my house when im home alone

last year i (24m) was home alone when i hear a knock on the door, it was my cousin sarah who lives in the floor above us. "can i come in? the wifi is bad at my place" she was wearing a thin pink sundress that had spaghetti straps, lands mid thigh and a big side gap. you can tell she was not wearing bra.
i say "yeah come in" she comes in and says thanks as she slides her hand on my neck.

i get back to my room push the door but no close it. my room was facing the living room shes in. i can see her spread her legs amd pull the sundress revealing her smooth thick thighs. i can tell she isnt wearing panties either.
i get hard from that sight, i always had a crush on her but the way she was dress and how she touched my neck when she got in... could it be? noo i tell myself.

a few minutes go by and i hear her lwt out a soft moan. i check again and i see her taking selfies making sure she gets her breasts as big as possible. she had firm looking breasts with a good size.
a minute goes by and i hear another moan, then another. this continues for like 5 more minutes
i cant handle this i lay on my bed and start to masturbate.

the moans i heard got me wild, my mouth was drooling with slimy saliva. i lick my hand and lay on my bed.
i wrap my hand around my dick and slowly stroke it, i was so sensitive from her moans. after the first slow stroke i uncontrollably started to grip hatder and go faster.
i go faster and faster amd the sound of sloppy strokes fill the room as i reach climax i let out a gasp for air.
i hold my cock tight to not let the cum shoot everywhere.
i get up still holding my dick looking for something to bust into.

i hear the door swing open, my heart sinks to the floor. i turn around pants down cock in my hand and i see her...
our eyes lock and my grip fails shooting my load on the floor. she looks at me and says with a blushing smirk "dont worry i wont tell anyone, i came down here to masturbate too. i couldnt find privacy at my place"

shocked and confused i couldn't believe what i heared.
i thought i was dreaming i go sit down with my pants still down and hand still wet with my saliva. she looks at the cum on the floor amd says " this doesnt mean anything, and dont tell anyone" then she walks towards me, turns around bends over revealing her sweet butt cheecks to me as she licks the cum off the floor.

i was frozen and in shock, she stands up and walks back upstairs leaving me confused as fuck.