Mother-in-law drama. Do not recommend.
In a nutshell, it was years and years of snide comments and criticisms and other "mean girl" things whenever my husband was out of earshot. She played one role in front of him, and a completely different one behind his back, so he often thought I misunderstood what she was saying or I was being overly sensitive. Well, when I was pregnant with our son, she dropped the facade and he finally saw her true colours. There was a huge blow-up a few weeks after our son was born, and neither my husband nor I have spoken with his mother (or father, for that matter) since. Our son will be 5 in a few months.