Living poly

For 2 years I've been in a 3way relationship with my husband and another man.
Started when had had a locum Dr turned up without anyone organising his accommodation so he came and stayed with us for what was supposed to be a few days but 3 years on he a permanent Dr now and still living with us.
A couple of other people know I share his bed as often as my husbands but mostly people and family just think he is a flatmate/boarder.
I never imagined that I'd ever have ** with another man other than my husband but here we are 3 years on and it works great apart from secrecy which is tricky at times as we are so comfortable with it sometimes it's easy to forget when others are around.
My husband commented on how relaxed I was with another man in the house and asked if I fancied him. I said no but he laughed and said he could tell from how I answered that it was a lie. He said if I wanted to try another guy now was the perfect opportunity.. It happened first after my husband commented when he was leaving for a nightshift that our dinner looked like a romantic night in and that we should enjoy the night. A few wines later and some flirting conversation I texted my husband mostly being cheeky and said dinners great and love having someone else cook for me. He sent back a wink and said you better be prepared to pay for it. I asked if he could handle that . I was amazed and shocked when he said replied that it would be sad to die wondering what another man feel like. Long story short I nervously end up finding that out.
I went through a raft of emotions following that night but my husband said once wasn't a fair sample, I didn't tell him then that it wasn't once but 3 times that night .
Then slowly over the next 6 months it evolved into what we live today , the guys are good mates probably closer than brothers. They hunt and fish together and have never been jealous of the others time with me.
Revitalised my ** life as I thought stupidly that as a grandmother I should act like one and do it less. Now I find on some occasions I'll have ** with both of them a short time apart and on a few occasions with both of them in one bed . I always thought and felt once I orgasmed that I could rarely go again,now I find I can and often do . It's quite a contrast between them with my husband 30 plus kgs lighter . We've had some close calls nearly being busted . We know more than a few suspect and hope if and when it comes out people will understand.
It's not all about the ** but that's great ,we all get on and financially it puts us in a way better position with a holiday home and 3 incomes .
I know I'd be devastated to give it up and I'm sure the 2 men in my life feel the same.