Why has my friend's husband done this?

I'd suspect he was always like this, but hid it from her in order to get her to marry him. Now that he feels she is bound to him, he can reveal his true self, his true feelings. 

Classic Abuser.

Usually the relationship progresses very quickly with the Abuser insisting on spending ALL their time with the (potential) abused. Insisting on moving the relationship along quickly, because "they just love them so much". But this stage doesn't last. 

Usually once they feel that they have the other caught, the real them starts to come out. At the start they can, and do, often switch between the "loving" partner and the abusive one, causing the abused to think "if I just work hard enough at the relationship, the good partner will stay." Nope. 

Second stage - 

- runs down the abused's feeling of self worth, making them doubt in themselves. Tells them they are unattractive, stupid, careless, lazy, has been making bad decisions, etc. 

- isolates them from family and friends, perhaps calling them a "bad influence" on the abused. Insists on being there with the abused, IF they are allowed at all. 

- takes control of ALL the decision making, saying that they are just better at it. . 

Then the heavy abuse starts - 

- the "RULES" which only apply to the abused, not to the Abuser, with the "DO as I say, not as I do" being enforced. 

- Financial control over all income, depriving them of money/resources, making them fully dependent on the abuser. 

- Controlling when and IF the abused can go out. 

- perhaps increased surveillance at home - cameras, phone, computer texts/emails tracking, geo tracking on cars,  etc. -, claiming its about "security", but actually using this to check on the Abused when the Abuser is not with them. The Abused won't have access to the same information though. And it won't be used on the Abuser's equipment either. 

HINT - the Abuser will mention things that happened to the Abused during the day that they could not have known of, without the surveillance. 

- Physical abuse or the threat of it "I could just punch you right now", fist shaking, punching walls, breaking things, etc. Saying its THIER fault that this is happening and if they did the "right" thing it wouldn't happen at all (lies of course). 

- outrageous jealousy with uncontrollably rage. Not requiring any proof of infidelity, its just what they think "might" happen. Making the abused feel like they have to walk on egg shells to avoid conflict. 

Show her this list, if you can. If he checks off more than 2 or 3 she had better run now. 

WARNING - he may well appear perfectly charming around others, even romantic with her when they are out,  making it harder for her to be believed in what is happening at home. 

What's likely going on is that she ignored some major red flags because she was so intent on being a bride. 

It's called "buyer's remorse."

Tell her that he is a narcissist. It will only get worse. Check out lovebombing, devalue,  discard. He love bombed her now she's trapped and jekyll and hyde is coming out. He's devaluing her now this is his real self. He will never be the same. Now she is in the cycle. He will hoover and lovebomb her again but this time it will be shorter and shorter before he devalues her. Please have her look up on YouTube narcissist 

because now he can say/do what she wants. unless she wants an immediate divorce. which would look bad on her and make her so embarrassed in front of everyone. i hope they have a prenup 

She needs to get the marriage annulled fast.    Thats why you date for five or so years, so the true person comes out.

nope he was always a jerk and she though she could change him with marriage 

IF I had to guess ,, SEX lack of turns out your friend is a dead fish ,,, did they have premarital sex or did he find out the bad way marring her 

Now that he has her "trapped", 

he is showing his true self. He 

is just started on the path of 

destroying her emotionally 

and psychologically. If your 

friend has ANY brains she 

will be getting as far away 

from him as she can and 

starting divorce proceedings.