Please see kind with your responses on this topic, as it's super sensitive and difficult for me. Basically, mother in law has made some rather crappy comments in the past, and never apologised or acknowledged them.
To name a few:
When me and DP found out we were pregnant we were obviously delighted! We told PIL thinking they would be really happy, but MILs response wasn't one of happiness (despite this being her very first grandchild), her response was "Well, it's still early days". To me that sounded like, "Don't get too excited, you might miscarry". Then when we went for a scan she refused to look at the scan picture, and starred at the TV whilst FIL looked at it, he actually had to tell her to have a look. Both DP and I felt really hurt by this.
For context on this one, MIL has abandonment issues. After our DC was born, DP and his mother had an argument, nothing major at all. During the argument things escalated and MIL warned FIL to keep his distance from our DC, and he'll probably never see him, completely out of nowhere. DP told me about this, so I took MIL aside the next day to reassure her that we would NEVER stop her or FIL from seeing their grandchild. I done this because of her abandonment issues, and I wanted to put her mind at ease. I still feel like she should have apologised for her comment, but she never did nor will.
There was then a comment from her about how our dog was more important to DP than our DC, because we didn't want to rehome him. PIL have been trying to talk us into getting rid of the dog since DC was born because they believe that dogs and children shouldn't live together. Our pup is such a sweet-natured dog and is so docile, so there's no need to rehome him at all.
I just can't help feeling a little bitter towards MIL about these comments, and feel that both myself and DP are owed an apology, but I know we'll never get one. I have all the time in the world for people who have poor mental health and I know she suffers with her. However, she refuses to get help, she barely even acknowledges that she has issues. I feel myself starting to dislike her, which I really don't want. I want us to be a close-knit family with minimal animosity.