Sorpresa con mi suegra

We had an amazing weekend in a remote house that belongs to Anto's family, like a countryside house, near a town. Something strange happened on Sunday afternoon but I tried to take it with the utmost normality possible. Anto started cooking and my mother-in-law asked me to accompany her to buy some things at the center because she was going to stock up the house for the next two days of the holiday and she would get annoyed with the boxes and bags. I agreed and really, during the transaction, nothing unusual happened, no extra gestures, no awkward phrases. That's my mother-in-law, divine in every way, a lady. That night, already late into the morning, we started drinking beers with Anto in the patio looking at the countryside and between alcohol, kisses, and fondling we ended up fucking. Some screams escaped and I found my mother-in-law watching the scene with her room door slightly open. I saw her three times and she didn't get scared, continued watching almost with pleasure. I want to clarify that my mother-in-law is a true MILF: separated, tall, does much physical activity, has incredible breasts, smooth skin, and a gaze that ravages everything. She usually wears body-hugging dresses or polleras and an office-style shirt, as she dedicates herself to that. After that we went to sleep and the next morning I woke up earlier than Anto. In the kitchen my mother-in-law was preparing tea and I admit that I felt a strange but satisfying mix of morbo and shame. I don't know more about what. The truth is that while I approached to prepare myself a coffee, now yes, the piercing gazes and some unwanted rubbing between bodies began. We'll see how this story goes on if I dare to more. Of course, Anto knows everything absolutely and feels more morbo and shame than me, but deep down we like...