Me [M32] and gf [F30] live in a row of terrace houses across the street from another row of houses in the UK. Last night, it was incredibly hot when we went to bed and therefore we had the windows open for some air.
I came back from the bathroom to find my gf half dressed (pj t-shirt on and just pants (knickers for US audience) by the window looking across the street and she whispered to me that she could see one of our neighbours across the street having sex. I go over and sure enough, we can see the girl in the ground floor bedroom opposite having sex with her gf through her semi-open blinds (we know it’s her gf as we had said hello to them earlier that day). Both of them were writhing around naked and you could hear faint moans through their open window across the street.
I felt myself getting hard in my boxers and could see my gf’s hand gently rubbing the outside of her pants so pushed myself behind her so my cock was pressed against her ass and kissed her neck. She pushed back into me and let my own hands slide around her body to her boobs under her t-shirt and into her pants, letting out a little moan as I pressed my finger against her pussy.