So I have written a few times about my wife and I and this is the latest update of how things have been going. She now enjoys it when I mention someone else joining in whilst we are having sex as to start with she was a bit quite about it. I could tell she liked it as she would get really wet and cum a lot faster than normal but I think she tried to hold back at first. Now she might even say something first while we are having foreplay so when she does I know she is in a really horny mood. This post is about the latest thing she suggested whilst in action. My mother is on her own and decided to get a lodger to help pay the bills, so when she said who was moving in with her I realised I knew him from school days. Mark was a couple of years younger than me and had told my mother he had split from his wife and needed to get himself back on his feet with finances etc. Anyway me and my wife went round to see her one weekend and Mark came back whilst we were there. We had a chat about the old days etc and we all got on well together. We left and I didn't really think anything of it. Later on we went to bed and my wife seemed in a horny mood so we were touching each other and playing around, I moved and was on top of her and holding her wrists down above her head. I said I would like to tie her to the bed as we had not done that before and she said well you can't because of the type of bed we have so I would have to tie her to someone else's bed. The thought of that really got me going now so I said well who's would you like and she said Mark the lodger at my mums. This was sending me over the edge now and it was for her aswell. Her pussy was now soaking and we both came together pretty quickly. After she said she really enjoyed that but like normal she loved me and that this is just a fantasy and that's all it could be. Things progressed a little further a few weeks after though as we had gone round again during the day when we were both off work and when we got there nobody was in. I have a key to my mothers so went in and had a look upstairs to check but everybody was out. I had obvioulsy been thinking about are bedroom chat about her and his bed on the way there and it had got me in the mood. Whilst we were there I said why don't we look in his room to see if it would be possible to tie you to his bed. She was laughing and said don't be stupid but came with me anyway, we went in his room and we were joking about teasing each other and I pushed her on to the bed. I got on top and was holding her down and she was laughing and wriggling about. I them moved and lay alongside her and we started kissing, we had our hands all over each other and then before we knew it started to undress each other. Before long we were both naked on Marks bed and she was sucking my cock whilst I was playing with her wet pussy. There was a noise from the bed and she stopped and said what was that. I said it's ok just the bed moving. She said are you sure it's not somebody come home. No it's fine, we carried on and I said imagine if Mark walked in now, she was so turned on by this now and said I wouldn't mind at all if he did and that she would get him undressed to so that she could have us both. We both came and then quickly got dressed and left very soon after. I have now been teasing her saying that next time I will tie her to Marks bed so he can find her naked and do what he wants to her and she loves it but once again afterwards when she has calmed down she doesn't say anything about it. I think we have definitely moved further forward with things and really enjoy being able to talk freely about these things with her.