Spousal support.

My man is paying spousal support to his cheating ex wife in Germany (damn military men who can't wait to get married to the first pussy cat they can get👿) 
When does this end??? I feel like she will always be with us. I feel like I can't marry him. 
He says when he leaves the army he will no longer have to pay since they are the ones making him pay. 
But garsh darn it!! It makes me so mad that she's taking his money. Like eff off you cheating German whore!! 
Sorry just wanna rant. Please comment back to me.