Wunder - here's more info, etc.
First, what I've found out, at least from the experience Sue and I have had is that most people are not into the kinky side of this whole experience. Don has had some experience with married women before. I haven't asked him but from the conversations, I don't even think Sue or Don is aware of the degree to which domination can exist - that also extends to even the existence of devices like CB-3000's or whatever.
The other aspect is that, and maybe this is my doing since I'm the one that "talked" Sue into all of this in the first place, is that the focus I've given her in this whole thing has been towards her pleasure. Denial and teasing me are the extent that she's felt comfortable with thus far. What she hasn't expressed a desire for at all is to control what I do. Quite the opposite in fact as she's encouraged me to "enjoy myself" without her to my hearts delight. Indeed, as I may have mentioned - perhaps the closest she has come to wanting to express any control over me is her encouragement for me to masturbate, in my words, "till I'm dry". I've told her in the past (well before her going with other guys) that at times I would masturbate until I could only cum a few drops and that afterwards my cock would ache but that it felt wonderful to be emptied out like that. She accepted that as something I enjoyed both whenever one of us would travel on business or during her monthly. So, and I"m going out on a limb here - but if I had to say how she may move forward in this regard, it would be for her to continue her encouragement of me in this regard. Perhaps we're different than other couples as we both know and acknowledge that we each (yes, her too) enjoys masturbating so this could be the next step she goes to .
But again, in terms of denial - it is as Grinch put it - self-imposed because I find arousal in just the knowledge that she'd "rather not" with me.
If we were to move into the hypothetical - as I have said, if it was what she wanted (I really don't care what Don wants in this regard) then I would be willing to try it - but again, as I've stated many times - it could not be for an extended period as I just wouldn't put up with it no matter how much she wanted it. Same as denial - a few days, maybe even a week or so is plausible/possible - but beyond that, I just think it would affect me too deeply and possibly negatively affect our relationship.
I may have not posted it here but in my past, before Sue and I, long before Sue and I - back in college - I did have a few bisexual experiences. Yes, I did suck a few guys off - it was back in the days of drinking/partying and the first time, it just happened. I was in my dorm room masturbating and a frat-guy we knew came into the room looking for my roommate. We were buzzed from smoking funny stuff and one thing led to another and literally before I knew it, he'd cum in my mouth. It wasn't a shock - I have posted here (somewhere) that I have long been going down on my girlfriends - since way back in high-school. All were amazed that I didn't mind my own cum - and NONE of them thought it was weird or were freaked out by it. After college I did try it a few more times. It was exciting feeling the arousal in the guy and bringing him to orgasm but it was never the fulfilling experience for me so it's not something that continued.
If Sue, or Don, were to ask me to clean either of them off, I would be fine with it. Part of me actually thinks it would be exciting to taste their combined juices! But again, I don't get the feeling from either of them that they are into this sort of scene as it, in my opinion, is something that is beyond their range of norms. I do hope to be there Friday night when Don may finally have her bare. From the filled-condoms I've seen when they were here - I can only imagine how Sue will look, feel, and possibly taste afterwards and it is something I do want to experience. Just as I did with Brad - I know it is a very intense moment/experience and I already know how my stomach and psyche will feel when he does cum in her. But Sue and I also know it is something that we both want as both of us feel that it isn't quite real-sex if he doesn't cum in her.
The other aspect of your comments that I don't see us fitting into is the whole alpha-male role that you want to put Don into. I don't see this in his behavior - yes he's cocky and likes to keep Sue close and attentive - but I don't get the feeling that he wants to be dominant in Sue's and my relationship. Despite what everyone here has said - there is still incredible passion and yes, satisfaction, in our sex life together. I am still able to make her sing. Perhaps in time, Don will be able to touch her emotionally as I do.
It is true he does fuck her well, and he does have a bigger cock. But that is the extent of it - it is not as though Sue is worshipping him or his cock. So the behaviors that most seem to ascribe to that type of scenario don't seem to apply here. You mention my being submissive - but I don't see that happening in the way you are thinking as that is not me.
To Grinch and Marys-Pet and others - yes, I am well aware that an overnight visit for Sue is probably not far off. I am expecting that and will be accepting of it if it is her true desire and not just "what Don wants". I do not see longer vacation-type visits at all though as there is no way to explain that to our kids other than "mommy is going on a business trip" which is very infrequent and they know that. So to those here who are fortune-tellers and see this as inevitable, I beg to differ.
Perhaps we are too boring and too set in our ways at our age to be considering the more extreme cuckolding scenarios. I like the feeling of being on edge and knowing Sue wants other men sexually. I like knowing she "doesn't want me" on Wednesday and Thursday and I totally enjoy her teasing me with what she does with Don or how Don "does her" such as telling me she's very sore or tired afterwards, etc.
I also get the strong feeling that Don will probably tire of Sue within a few weeks or maybe a few months. In the meanwhile, he seems to me like someone who is happy to be getting a good piece of ass weekly without many strings attached.
Now, it is possible that maybe Don will get more posessive of her - that could happen and depending on the degree of posessiveness, I would be okay with going along with it. As it stands he is amused by my willingness to abstain from Sue on Wednesday and Thursdays - and he is aware of pretty much everything that went on between her and Brad so he is aware of what I am willing to do in some ways. So, perhaps, in that sense he may feel emboldened over time to try to say/do more. If it happens naturally and it is what Sue wants and not just what Don wants, then it changes the equation a lot. As I've said all along, I am incredibly aroused that Sue now really has a sex-drive of her own as opposed to being something that was our combined sex-drive. So I cannot say for sure how things will progress but I can tell you already that I am not the submissive type to be put under Don's thumb and controlled. So perhaps our method of cuckoldry is a bit different than others.
That said, anything can happen in the future. But I don't know that Don will be the one to take us to the extreme you are talking about. Perhaps he will be a step on that journey.