My girl and I went to help out a guy going through a hard time as a single dad.I had often told him how she is very open and adventurous when it comes to sex, anyway we had a bbq..I mentioned to him that depending on her mood she may be keen for 3some, so after we had bbq I went up the supermarket to get some soft drink for him and his boys, on the way back My girl text me and said they were in my mates room talking, I had an idea that she was not talking, so I walk down to his room and he said come in...I opened the bedroom door and their proudly with my mates cock in her mouth..his hand on back of her head..making her gag yet she was loving it...I sat on the bed stripped off and started playing with my cock while my girl was giving his cock a thorough head job, my mate said that she instigated it, and he couldnt say no,I'd heard that my mate was hung and thick..and he was, both my girl and I had a feeling that he might be keen for me to blow him as well, so I told her to keep on blowing him, and I started fingering her then fucking her, asking my mate if she gives good head, he just moaned, so she was on hands and knees sucking his great looking cock me fucking her, I leaned over toward her neck and asked her if she was enjoying his cock, she quickly said its rude to speak with a mouth ful of cock, so I leaned further over whispered to her that I wanted to suck his cock to..she grabbed his hard cock and I started sucking the head of his cock, he grabbed my head and started fucking my mouth, And making me gag from the length and girth, my girl moved and i stopped fucking her, and she watched as he used my mouth, she was dripping wet and sooo horny, after cpl minutes he stopped and started playing with her again, now she isnt into being a sub or restrained, but he got her on the end of his bed..her ass in the air..her head on a pillow..then grabbed both her arms and pinned them by her side so she couldnt move, Then slid his cock slowly in her pussy...I looked at her and asked if she was ok..she nodded..he started pounding her...then slipped his thumb in her ass...she was definitely ok..she started groaning and moaning loudly, she loved getting fucked by him..so I had to keep the noise down, by shoving my cock in her mouth..even then she was moaning from him fucking her...I whispered if she was ok being restrained and fucked..she just nodded, as she was unable to say anything, I asked my mate how she felt..he just hi fived me and kept fucking her, well since that night I've dropped in to see him, and one night he had porn on..he had no problem jerking off in front of me..nor did i..so i too got my cock out and jerked of too..until he stood up and told me to suck his cock..I didnt need to be told twice..I started sucking his cock ..he grabbed back of my head and started saying how great it was fucking my girl, I jokingly said call her and tell her...to my surprise he grabbed his fone and called her, while my mouth was wrapped round his cock...he told her how grateful he was to fuck her, and thanked her, she must have asked what he was up too...he told her that his cock was getting sucked and he was thinking of her..she assumed it was a girl giving him head, he said it wasnt a girl, but told her it was me...well I dont know what she said to him but he got rock hard talking to her, And started talking about what he wanted to do to her, all the while im gagging on his cock tasting his precum..jerking myself off, then he pulled his cock out of my mouth...still holding back of my head...gave his cock a cpl of jerks..then blew his load all over my face, ..turns out she told him to use me..and shoot his hot cum over me...well since these events occurred, he has often dropped in to our place for a chat and coffee, often im at work, but my girl does the right thing and calls me ...just to let me know that he is fucking her...whilst in the background my mate says thanks mate, see you when u get home from work...the 3 of us have a great friendship/ FWB he respects both my girl and I, and is always respectful and very grateful to have this bi ..fwb arrangement...and both myself and my girl enjoy playing with him...alone or together...and the fone sex calls take our arrangement to another level