It's a sad thought, but it's true. I remember when I ended up having to nearly carry my friend home after his drugged up, drunken moment with a girl from class.
At one point, he showed me his underwear that he was carrying in his hands and said to me that he couldn't remember how they got off him. He told me he asked her if they had sex, she said yes. But denies it when they are back in school. He was piss drunk and completely wasted but that does not stop a guy from getting a hard on. It will stop a guy from remembering how he got into these situations.
He was basically raped. We found out later on that it wasn't the first time this girl got him drugged up just to screw him. This girl was totally fucked up. She even brought her cousin with her to hang out with us. This guy totally tried to force himself on me. I don't want to get into it. But yes, my friend was raped. He was not consciously aware of what was going on. It all felt like some sort of wet dream to him and he had very little memory of what actually happened. I just happened to be there to witness it.
People need to remember that guys can be raped by girls doing exactly this sort of thing. Get them wasted so they lose a lot, if not all, of their inhibition. The hard on is there, but the mind is not.
Now, 1979, your situation: I'd say you were not totally wasted, but in a drunken horny state of mind. 1979, you could have stopped it. I'm not saying you deserved the gonorrhea by any means. But, I do believe you could have shown some resistance to your two best friends.Whether she was hot or not should not have made any difference. I hope your best friend (her husband) understands what happened, but I wouldn't suspect he's going to trust you much after that one. She used you. She used you badly. She may or may not have known she had that disease, but for Christ's sake, you at least should have worn protection. You don't know where she's been or her husband. You don't know if he ever cheated on her and gave her gonorrhea or did she sleep around and catch it from someone else. You also could have gotten her pregnant and that would have been an awful mess to explain especially if she had managed to keep her mouth shut. NO, she should not have made these advances on you as her best friend. She not being drunk at the time this happened only says to me that she was never a friend of yours. She put you in this situations. You should not have responded to her advances, but she should have kept these feelings to herself. Now she has most likely damaged whatever close friendship you had with her and her husband. Had you kept your body to yourself and not shared, this also would not have happened, but you would have still felt very awkward around them knowing what she wanted.
I hope it all gets cleared up. I"m sorry you got sick. Get new friends...ones that don't screw over their friends like this either.