Exhibitionism Inside The Family?

We discovered our exhibitionist side by accident. before our kids started school, we left them for a week at her grandma and had some goot time at fuerteventura an island from the canary islands. One week only hotel, pool, beach and ocean and sun. We have had sex at the beach in the evening, when there were no people around. but most of the time we did it in our room. It was hot and the windows were open all night long. One night we left the light on because we like to watch each other and we started the warmup with a 69. When we both had come for the first time of the evening and I went to the bathroom I saw a older couple outside. The had the appartment on our right side and in the moment, I saw them sitting there, a bit higher than our terrace, I knew, they must have had a wonderful look at our bed. They waved over to me, I was still in the nude, and they both did a thumb up tu us.When I came back I knew, having them watch, made me horny and I took the curtains more to the side so that they could see better. They must have been in their 70s but that was not the point. I told my husband and we did a real little show for them. From that experience we took with us, that at home in our house only the Toilet, the kitchen and the Guestroom do have doors. the other have only curtains and these are open most of the time. Our kids have been young enough for it with 5 and three and they grew up with it and even now, they are 13 and 15, there are no doors and its the normal for us.