Sorry

When you touch yourself, think of me.
When he touches you, they’ll be three.
Sharing a moment never seemed fine,
Now I’m there all the time.
It was real so very long ago,  
Can a memory like that ever grow old?
I’m sorry to invade a simple happy life,
A faithful, loving mid-aged wife.
Do my desires burn like fires?
Or do you wish for me to just expire?