Neecy, I want you to know I am not implying that you should completely bury your head in the sand. It IS possible that the cigarette butts are H's. It IS also possible that they are OW's. Who knows, and who cares.
If he's still seeing her, it is BEYOND your control. It always has been.
Your H is out of the house living his life as he pleases.
For your own sanity, you must start focusing on living your own.
(((Hugs)))
Getting over a painful experience is much like crossing monkey bars. You have to let go at some point in order to move forward. ~ Joseph Campbell