Skyler and her boss

His motives may have somewhat changed later but initially it was for his family, and till the end he wanted to make sure the gimp got his money even after his betrayal and insolence.

You totally missed what the show is about.

The most obvious double standard is when Walt isn't hated for unnecessarily placing his family at tremendous risk mortally, psychologically, economically, and socially. Again, cooking meth was unnecessary, as Gilligan and company took care to establish by episode 105. Whereas Skyler is hated for sleeping with Ted.

It's a cruel absolute that holds that no matter how absurdly bad the state of your marriage gets, caused almost entirely by your unfaithful, meth-cooking husband, who has put every life in the family in danger, including a newborn - you have no justification for seeking relief in an affair - even during a separation.

No matter how many and how egregious Walt's betrayals may be, and how desperate the situation they created, his wife's response is considered beyond understanding or mercy. His wife's sexual affair - even during a separation - is reflexively considered as the only form of serious unfaithfulness.

Walt had become distant, blatantly withheld crucial information, and concocted multiple transparent lies. He did this despite the fact that his wife had given him lots of latitude for his strange behaviour, and despite the fact that she'd been in his corner as he coped with the cancer diagnosis, prognosis, and treatment, supporting him and advocating for him - "in sickness and in health."

As a result Walt disrespected the fundamentals of marriage, sewed estrangement and mistrust, began to neglect his responsibilities as a father - such as getting his son so drunk he vomited in the pool at a family get-together, and resenting his efforts to fund raise to help pay medical costs until Skyler spoke of his callousness and begged him to at least acknowledge and thank Walt Jr. - and even to physically abuse his wife. His standard of parental and marital conduct continued to decline in Season 2. Always with excuses.

To sum up, by the time Skyler initiated the affair, the following had occurred, over seasons 1 and 2:

- Her husband had been unfaithful, unreliable and disrespectful to her in many extreme ways, violating the fundamentals of marriage, sewing alienation and mistrust, and neglected his responsibilities as a father;

- Her husband had told her painfully transparent lies, and she was painfully aware that they extended to their son as well, whose dignity she begged him to consider. He wouldn't acknowledge, let alone thank, Walt Jr. for creating the "Save Walter White" fundraising website until his wife criticized his callousness;

- Her husband refused to share what was going on for him after she'd made several soft inquires then more pointed requests;

- Her husband's cancer had gone into remission and the tumour had shrunk 80%;

- he was late to her ultrasound, where she'd been left to make a decision about a c-section because she was facing a dangerous delivery;

- she called and texted Walt multiple times on his cell ("BABY COMING!!!) and although he received them he didn't respond (he was busy ransacking Jane's place for the meth: "Not now!") and arrived at the hospital only after Skyler had delivered their daughter;

- she discovered her husband had two cell phones and had lied to her about them;

- she discovered that Gretchen never gave her husband any money for his treatment;

- she discovered that her husband never flew to visit his mother the day she dropped him at the airport;

- after frantically canvassing the town for her missing husband she discovered his "fugue state" was a lie;

- her husand sexually assaulted her. Yet she even cut him slack because she assumed it was due to the pressure of having cancer;

- she forced out the truth and learned her husband was a meth cook, unnecessarily placing the family at tremendous risk mortally, psychologically, economically, legally, and socially. She knew her husband had been handed his salvation (to borrow Gilligan's word), but had turned it down. And ironically had lied that he was receiving money for his treatments from Gretchen and Elliott.

- Her husband had defied her by not only refusing to grant an uncontested divorce in exchange for her silence about his criminal activity in order to protect the children, but actually moved back home, and framed her as the perpetrator and he as the victim, poisoning their son against her, and calling her bluff with the police.

SKYLER
Oh, I know. I know you're not.
'Cause I asked her. It really took
me forever to get in touch with
her. She was ducking my calls
for weeks. So I finally left a
message, 'What exactly is going
on between you and my husband?'
I thought that'd get her attention
and it did. So she called me back
and she finally told me. The money?
For your treatment? Gretchen and
Elliott didn't give you a dime. They
paid for nothing. You refused every
offer they made you, but that didn't
make sense because I checked with
Delcavoli in the hospital and, not
including your surgery, we're nearly
paid up. Over $100,000. Out of
where? Out of thin air? But then, I
called your mother. Yeah. Thanks
for that, too. But I thought, y'know,
maybe she has some money that I
don't know about? Maybe she
contributed? It's possible. It turns
out that not only is the money not
your mother, she didn't even know
that you have cancer. You never
went to see her. I dropped you at
the airport, I picked you up, you
were gone for four days, and yet
she swears that you were never
there. Lies on top of lies on top
of lies.”