Hi so Im trying to find a movie I saw a long time ago, it’s probably from the early to mid 2000’s

I remember from the plot several things:

There was a man who murdered every person this ‘blonde-looking’ woman complained about, I think she had a yellow shirt and the movie had a dark vibe

When she found out he was a murderer, she also was pregnant and she helped him dig a hole to bury someone

It seemed like she thought he would kill her too and thats what the hole is for, but in the end she helped him bury a body