Staying at Friend's House

I was staying at my friend's place in Spain where he and his wife had moved to. They have a huge house with a large garden and an indoor swimming pool. I arrived late one evening and after a couple of drinks with my friend and his wife Victoria, went to bed. The following morning I woke up in the guest room to a sunny morning. I wandered out into the living space and Victoria was there, dressed in a robe making some breakfast. As was the plan, my friend had gone into work as it was a working day and I was going to relax around their house and enjoy some sun. After we had eaten breakfast, Victoria asked:  "Would you like to go for a swim?" It was really warm so I was very happy to do so. "Come on, I'll show you the pool". Victoria said. We went downstairs to the lower, ground floor of the house and it opened up onto the pool area. The water was calm and flat and looked very inviting. "I love having a pool" Victoria said eagerly. Especially in the summer when it's really hot outside, it's so nice to come down here, strip off and relax in the pool. I think I might go in for a dip now as well actually." She then slipped her robe off her shoulders and let it fall to the floor and I realised she had nothing on underneath the robe. "You don't mind my swimming naked do you? I never wear a costume in the pool, it feels so much nicer in the nude." I tried not to stare at her too much and said:  "No, I don't mind. It's your house, so it's good you have somewhere you feel so comfortable". "I certainly feel comfortable being naked with you, we've known each other for years now and I feel happy to be like this around you. Why don't you strip off and join me?" I wasn't sure if she meant for me to be naked as well, after all this was my friends wife. "Erm, I'm not sure, my swim shorts are in my room". "Oh don't worry about that, just take those off and come in and join me, I don't mind if you don't." She said, as she walked towards the pool steps. "Ok, if you are sure you don't mind." I said. "Of course I don't, don't be silly." She replied and slipped into the water. I pulled off my t-shirt and slipped down my shorts and then my underwear and sheepishly walked into the pool. "See, doesn't match that feel great against your skin?" Victoria asked. "It really does, you are so lucky to be able to do this whenever you want". "Yep, I'm in here all the time, particularly when I'm home alone during the day. I love to have a swim, then go out onto the terrace and sunbathe to dry off. The advantage of having a secluded place, no one can see onto the terrace so I have it all to myself." "You sunbathe naked as well?" I asked. "Of course!" she replied. "As I say, no one can see, it's just fields all around us. Here, let me show you..." And she took my hand and led me up the pool steps and out through the window doors onto the terrace. "Here, grab a towel and lay out in the sun, it's so nice when it's this hot". She said, motioning towards the pile of folded towels. Victoria lay out, stretching her arms and legs and let out a contended sigh. "One problem with all this heat though is that I find I end up feeling really horny when I lay out here." She said with carefree nonchalance. "Most days I'll just close my eyes and relax and let my imagination take over. I have to admit, I usually pleasure myself while lying out here." "Really? Outside, you mean?" I said, a bit shocked at her honesty. "Yes, it feels even better outside. With the sun and the air against your skin. I normally orgasm in no time." I didn't know what to say, and just stayed silent. She turned to me and said: "I'm actually feeling really turned on now to be honest, do you mind if I masturbate now?" Stunned, I said: " Er, ok. I'll go upstairs and give you some privacy." "It's ok, you can stay, I don't mind, just enjoy the sun." And with that she slid her hand down her body, lightly touching her breasts before touching herself between her legs, letting out a soft moan of pleasure and a squirm as she did so. "Mmm, that feels so nice." She said contentedly.  By this point my penis had started to become erect and I couldn't hide it without making it obvious. Turning her head to me she said "It looks like you are feeling the effects of the heat as well, why don't you join me and pleasure yourself as well?". "I'm, not sure I can do that with you here." I said, embarrassed. "Why not? You do do that when you are by yourself don't you?" "Well, yes sometimes I do." "How often do you masturbate?" She asked with a sneaky smile. "Well it depends, on my mood and stuff." I said. "Aren't you in the mood now?" She said as she leant back again and continued to touch herself. "I do it everyday, often more than once." And with that she started to really get involved in her self pleasure, closing her eyes and a few minutes later looked like she had a really satisfying orgasm. "That was beautiful." She said. "I'm going for another swim, I'll leave you to enjoy the sun, see you in there." And with that she stood up and walked back across the terrace into the pool.