My husband fantasizes about me having sex with other men not sure what to do about it

We have been married since 1994 and were together for 3 or 4 years prior. He is in the navy and I cheated on him several times when we first got married he only found out about 2 but it was at least 6 other men durning times when he was gone. later it happened again and he found out. so you can imagine it has been pretty hard. of course i was young and had all the excuse in the world why i did what i did what i did at the time. we sparated in 1999 and got back together in 2004 when this happened he started thinking of ways to sexual please me like wanting to use differ dildos while he ate my P****y. "I enjoyed this very much by the way. I told him about most of my indescretions and the guys i was with while we were separated and that i wasn't interested in that life anymore. he didn't get upset or anything he just listen calmly. after a year or so he started suggesting that we swing (have threesome ect..) i had no interest in it at the time so he let it go. he want to bring another woman into the situation. i wasn't really interested in that since I had done it before without his knowledge and said no and my argument was that he wouldn't want to bring another man into the mix i thought that would be the end of it. so after a year of talking about it we went to a swingers club and we went home with a couple and ther was another couple with us so it was three couples all together he had sex with both of the women and i had sex with one of the men and one of the women. "the other guy was older and didn't participate. I enjoyed itvery much but i didn't want to do it again becuase i felt a litttle jealouse seeing him with the other women, but he didn't seem bothered at all see me with the guy. he's asked me alot about doing it again but I just say "no" and walk away from the converstion. I realy dont know why because deep down I want to. we've been in marrage counseling for communication and of course the infidelity. but one day he sat me down and explain to me what was going through his mind.and basically he fantasized about me having sex with other men in front of him and it was because of what i did that caused him to feel that way and that it's a constant thing . He's a very loving father and not a weak man in any sense of the word, but have hard time figuring this out. he's says that it made him feal a bit insecure at first but after that night with the couples and seeing me with other guy it was clear to him what his problem was. He sees it as his problem because i tell him i dont want to do it anymore and that it's always on his mind it took him a lot to tell me this and could tell because he was extremely anxious to the point he was almost trembling because he was so embarrassed to tell me that. this isn't like him at all. it wasn't a request it seemed like he just bore out his feelings. i know what i did in th past was wrong but could it really have and effect like this and what can i do about it. I think he at the point that he wants to leave because of it He dosn't seem to like that he shared that with me and neither of us have talked about it since we had the conversation. I am not opposed to the idea but I not sure what to say either.

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