I understand where you are coming from. I have some different perspective being a woman. I think the meat on the floor is a culture thing that seems really gross to us.  I do think crazy horomones compounded by little sleep could actually make you think you’d be better off alone. I’m sure not saying it is ok for her to say that,  but I understand her weakness there.  OCD is a serious problem here because I understand that’s pretty common with severe OCD people, to make threats like that. It’s really unhealthy, I hope he can help her change that.

Each couple has their own unique issues that require some work.

I was how you described your wife with my first 4 pregnancy/postpartums. The last one I was a complete disaster- much worse than typical post partum mood swings. It’s hard to explain, but the thoughts in my head really did feel like reality, and they were completely irrational thoughts. Thoughts against my husband that were unfounded and unfair led me to feel I made a huge mistake in marrying him. It was terrible. I got on some horomone balancing supplements and it was like the fog cleared. I apologized profusely many times and was so grateful he was so patient with me during that time. He admitted to me afterwards how hard it was for him. Bless him. Next time I will be more prepared by taking better supplements during pregnancy and post partum.
I’m not sure how else to explain it other than to talk about my personal experience with it.

No, to all of this.  Post-partum depression or any kind of stress just makes your normal thoughts heightened. 

The wife's OCD may have gotten worse, but she always had OCD. 
The wife's disrespect got worse, but she was always disrespectful. 
The wife's threatening to leave and manipulation got worse, but was always there.

Stress doesn't change a person's character; it just makes one act to the extreme. 

Stress also doesn't affect free will nor does it stop God's graces.  God will not allow anyone to be tempted beyond their strength and this includes stress amounts.

It is an error to blame sins or a sinful nature on stress.  

No, to all of this.  Post-partum depression or any kind of stress just makes your normal thoughts heightened. 

The wife's OCD may have gotten worse, but she always had OCD. 
The wife's disrespect got worse, but she was always disrespectful. 
The wife's threatening to leave and manipulation got worse, but was always there.

Stress doesn't change a person's character; it just makes one act to the extreme. 

Stress also doesn't affect free will nor does it stop God's graces.  God will not allow anyone to be tempted beyond their strength and this includes stress amounts.

It is an error to blame sins or a sinful nature on stress. 

Nowhere did I say it wasn’t sin. I thought I made that clear by saying it wasn’t ok what she did 
Stress makes it easier to sin. Also, PPD cannot be simplified down to “stress”. 

So her anxiety is a catalyst for her leaving you?

To be honest, if I had a dime every time a woman today said she has "anxiety" I'd be a wealthy man.

I don't buy that, man. We all have vices and quirks, but this is whole thing is just her manipulating you. Period. I understand the child thing, and I understand, this may be your cross. What she is doing is wrong, OCD/anxiety or not.

I agree. I know it's wrong. I would know, heh. I don't think she would leave. It's a cruel bluff.

It is difficult for women to respect men. It is all the more difficult when, in our current world, there are zero cultural models for women in this regard. The best one can hope for is to be raised in a home where the wife respects the husband, but even that can be undermined by a combination of pride and even minimal exposure to the culture.
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This has been a problem since the beginning of time, and it will not stop being a problem. The question is how a given man works to solve the problem. 

"It is difficult for women to respect men."
Wait what? Why?

"It is difficult for women to respect men."
Wait what? Why?

Because they are more given to vanity and resentment. 

Yeah. Being hard on someone that has a psychological issue?? That's not a good idea. It would be like going up to someone with a weight issue and being angry at them for not controlling their weight better.

Fat shaming was the way people encouraged to stay slim up to about 20 years ago. What do you suggest we try now?

Well said ^^^

OP...  Prayer for you and your wife.  We are 5 weeks postpartum with baby #4.  When we had our first baby I was a bit too cautious about germs.  I thought the baby would get sick a lot if I wasn't super diligent about keeping everything super clean.  It was super stressful and we didn't see a lot of people just because they had a simple cold.

Now that we have 4 boys...  Well, let's just say that it is nearly impossible to keep things clean.  They are always bringing dirt and rocks inside.  And some days...I don't realize that their hands are covered in dirt until after they eat lunch. 😅🤣

I think I heard somewhere that living on a farm made for the most healthy people.  Isn't it true that exposure to some germs helps build better immune systems?