You need to do the opposite. Ignore her when you come home, if this is just "peeing with excitement" pee. Come in, put your keys down, don't greet her or make a fuss. She should learn that your coming home is not a big event that she needs to lose control over. Then, after you have let her out to do her business, and that's accomplished, you can have play time and excitement - after her bladder is emptied! Does she do it every time you come in, or just when you've been gone all day? It all sounds, with the "slinking around" like it's a submission thing, so work on socializing her and giving her "jobs" to do to help her be more confident! Has she done any training classes?