First off, open and honest, we are newbies. However, my wife and I did a lot of homework before we even thought of a first encounter. Hours of talking, sharing fantasies, and setting some goals and rules. One of our steadfast rules is we will not play alone. We will each be present when play happens. Our short time in the LS has been an experience to say the least. Some good, some not so good, but none either of us has said was bad.
How to handle the awkwardness is going to be a personal decision. Some couples do play alone. Personally, I have ED issues, but my wife, who adores me, is good at hiding that little issue while enjoying the experience. There have been nights when I have fallen short, and other times when things were up standing. On the bad nights, I simply sat back and enjoyed my wife having fun. I do get a lot of pleasure seeing her being pleasuresd.
Do my emotions sometimes get me? Yes, but that is when I remind myself that it nothing more than a toy and she will always be my wife and Queen and I am her husband, king, master. Just as in certain nights it will be me playing and her watching, she is assured that my love for her is always going to be, and I am just using a toy.
To be in this LS and married takes commitment, and more honest and open communication that anything. Talk, communicate, love, hold, and never be jealous. Enjoy those times seeing your wife as she is being pleasured. Just as I am sure she will be as pleasured seeing you deeply pleasured by another woman.