I [M] found a pic of my mother-in-law’s pussy and I jerked off to it

Ok so first, I’m sorry for my terrible english and I’ll hop you’ll understand and enjoy my confession.

I’m 26 yo and I’ve been with my gf for 4 years now.
3 years ago, my gf’s parents divorced so my mother-in-law is now single (at least “officially”). She is an attractive woman even if she’s 47 yo. She has curly brown hair, green eyes, she’s quite skinny but with a good pair of boobs, probably a C cup. Moreover, since her divorce, she’s in that “single mom who has decided to enjoy her new life” mood. Therefore, she pays attention to her clothes and she often tries to look attractive. I have to confess that I’ve been staring at her ass and cleavage a few time by the past.

Anyway, that day, I was at my mother-in-law’s house with my gf but her mother was not here. At a time, my gf was buzzy calling a friend. As I was alone on the living room, I started scrolling on the iPad of the house…so the iPad of my mother-in-law. Then, I did something that I shouldn’t have done : I looked on the pictures gallery of the iPad and …I start searching on the “recently deleted” folder.