It just started

Working out of town together, my cousin and I both 30 only a month between our birthdays. We both were working for the same law firm and were sent to work out of state for two weeks and neither of us were in a relationship. The place we were at was boring as staring at a rock. Nothing exciting happens here we were told; the last bit of excitement was 3 years ago when a car's tire blew that was it no accident just a loud bang then nothing. Only the bar for entertainment and that was just drinking. My cousin and I aren't anything special in looks, but we are quite fit. After several days I was sitting with cousin and said I'm so bored I might run naked down the street to see if that improves the place a little. Her response was, they'll probably not even notice as they are so fixated on their own lives. Then she added strip off anyway it might brighten up my day. So, just to tease her I stripped down to my shorts, the shorts too she responded. I said only if you strip also, not expecting her to agree. She thought it over and said what the hell and she started to strip. She was naked first, but I removed my shorts shortly after she was totally naked. I looked at her and she at me and I finally said you want to fuck. She stayed quiet for a short time and then said might as well we're both naked. After our first fuck, we laid together for a while then fucked again. By the time of our return, we were fucking almost every day. I expected it to stop once we were back home. But she decided it was great relaxation for us both and we've continued fucking, able to date others as no restrictions in place. Only major change was she moved in with me, my place is closer to our offices then hers.