Help With Girlfriend Housekeeping..................…

I've been with my girlfriend for over 7 years now. We started staying together at about 3 years around the time she got pregnant with my son. We currently stay at her moms house in a room connected with the house but its a size able room that was added on. Its about the size of two master bedrooms with bathroom and our own entrance, not too bad for us 3 for now. It has a fireplace, sliding gl doors, bar w/ sink, shelves and closet, It would look real nice expect that this room is always a "complete" mess. There's always clothes, toys, trash, food, etc just laying around. Dishes weeks even sometimes "months" old laying around. It I were to rate it from 1 through 5, 1 being ransack dirty, 3 being average and 5 being completely clean, I would rate it 1 1/2. She says its because she is currently pregnant but shes always been like that, and even if it was because she was pregnant, is that even normal. I know for sure pregnant women aint that lazy.I dont wanna sound mean but this room is filthy. Also our 4 year old son is always making a mess with toys and throwing things around but like normal people I would expect her to clean up while Im at work which does not happen, even not being pregnant. She says I'm a clean freak but come one, I can handle a mess but dirty, damp towels under the microwave for weeks, thats nasty. Never sweeps, barely take out the trash even though it pes by twice a week. I wanna know what ya'll think....... do you think I'm over exaggerating about her cleaning up, for does she have to straighten up her act. NOTE**** I know that she is pregnant but shes is like this all the time and she has to clean up at least a little which she does not do at all.