Jan is really my wifes friend ,she lives alone on 5 acres. One day wife asks me to go to Jans and get her mower to start. While i was on my hands and knees her Wolfhound dog tried mount me ,Jan got him away and nothing was said , till later . While we were having a cold drink I asked does he try that with you ? All I got was a silly look ,so I pushed on until she told me one day after she got out of the shower sitting with just a towel round her the dog had put his nose under the towel and licked her c**t .And she said sheepishly I didnt stop him. She said please dont tell Tess [my wife] I promised but she wasnt convinced so I confessed to her that I often wondered what it would be like to let a dog fuck me. She admitted she had wondered but was afraid to do it alone in case there was a problem.After much talking we swore to keep the secret a she would do it if i did. Jan suggested we do it in her spare room where we could see the road in . Jan got naked and knelt down then I let the dog in ,he went straight to her didnt lick her he just mounted her she groaned and said he slipped right in . He wasnt going fast but good hard thusts Then Jan gasped hes cum hes cum,I twatched and he turned so he was butt to butt with Jan She said the obvious we are knotted .Jan told me later she had orgasmed multiple times but the best was when they were knotted.To shorten this story later that day {rang the wife said I washaving trouble with the mower] I got naked on my knees Jan lubed my arse then let the dog in he sniffed my rear for a while then mounted me Jan was ready to help him but he pushed his dick right up me I was in heaven I dont know how long before I felt his spunk enter my arse but it felt great he eventually turned and that feeling of the knot pulling is more than I can describe , I came on the towel under me Jan was ready for that.When he released me I showered Jan and I laid naked on her bed and compared notes on our first time being fucked by a dog ,we agreed we will do it again together . That was years ago and we did let him fuck us as long as he was able.