Can you check your local craigslist for a dogwalker or perhaps you have a teen ager in your neighboorhood you trust.. I think Laci would go crazy if I were gone that many hours....just a suggestion.. when you catch her peeing on the floor instead of putting her in Jail, put her on the pee pad and give her a treat..
Maybe you could try
www.pottypatch.com!!
I dont think dogs are spiteful either, so I dont think she is trying to show you!! I just think that often times a peepad looks similar to a rug so they pee on it.. That is the reason that I dont use them...try the potty patch , put a pee pad on since she is familiar with them , then after a few days remove the peepad..