Sorry I think i put this in the wrong section and I can't seem to erase it.
So my question to you is,"what would you like to happen?/ How do you feel about it?"
Are you ok with joining in? If not for yourself just for him? Then you could ask him to take care of you later. Joining in could be as simple as just caressing him or as involved as you would like to be.I am sure he will appreciate it.
On the other hand is you don't want to participate and are bothered by this you may have to address it in a different manner. You may want to say something the next day while caressing or hugging him like "hey someone was having fun last night". "Sorry I didn't join in but you know I had to get up early" Then see how he reacts! Maybe then you can discuss an alternative time for this.
Let us know how it works out.
Since I am up and I do have a HL, I think I would rather join in than be excluded.
What a great attitude! Have fun!!
My only warning is that I get the impression you feel "I should be enough for him, he shouldn't need to masturbate while he is seeing me".
When you see it coming, duck!
We are in our mid 30's and we both have HL.