The bigger question is why do you think she is scared/terrified? What are you doing that makes her 'pee her pants' like this?

 

I think she suffers from separation anxiety. So when she is all alone, I think she feels like she is getting punished.

 

If I hear you correctly you take her out of the crate to go potty...you go outside together.......she piddles on the deck while you're standing right there. That's not separation anxiety.

Are you yelling at her, giving her 'dirty' looks or making threatening gestures.....trying to get her out to the grass? If you're doing any of those things then I could understand why she feels threatened. Then, it becomes submissive urination.....what dogs do sometimes when they are scared.

 

I use to say no when she would do a submissive pee, which only made it worse. Now i just give her no attention, and try to ignore her. Because if I goto pet her she gets so excited and pee's all over the deck

 

Just relax and clean the deck and work on confidence building through the use of obedience training and nilif. She'll most likely outgrow submissive and excitement peeing over the next few months as long as you don't make a big deal about it.