Sarah Jessica Parker Finally Opens Up About Her Twitter Feud

"I can’t figure out what she hated so much about me," she said.

May 2, 2014 — -- Sarah Jessica Parker posted some very strong tweets recently aimed at a woman the actress said should be "ashamed" of herself.

The public knew the woman must have offended the "Sex & the City" star in some way -- but didn't know why.

Now we do.

Parker, 49, opened up to Net-A-Porter's The Edit about the incident.

"Your anonymity doesn't diminish your outrageous and vulgar tweet. And your deletion only reveals your cowardice," Parker wrote to the woman back on April 3.

Read: Sarah Jessica Parker: I Love That Matthew Broderick’s The Father of My Children

The woman allegedly questioned whether Parker's twin daughters Marion and Tabitha, who were carried by a surrogate, were actually her own.

Parker now tells The Edit: "I don’t think you can be like that without thinking about what you are saying. Other people can be mean, and that’s something I just have to make peace with. That was my worry before engaging in social media; I was afraid of it."

She added, "I see mean stuff every day: when I look at Twitter I scroll with one eye open and one closed. That particular day, it was just one of the things I saw. I kept scrolling and then I was like, ‘Wait a minute, did she just say that?’ I went back and I thought, ‘Well, this isn’t unhealthy paranoia, this is absolutely conscious. This was a choice.' She, not subtly at all, said that my children are not my children."

Parker said this was one of the few times she responded via social media to an attack.

Related: Sarah Jessica Parker Smacks 'Mean Girl' Behavior

"But I wrote back, ‘What? Like, is this fun?’ She never responded and deleted it," she said.

Parker also couldn't understand why this woman chose her to pick on.

“And what is it about me? I am not somebody who shows off her good fortune; I don’t travel with bodyguards, I don’t live a very glamorous life – I am afraid of all that,” Parker said. "So I can’t figure out what she hated so much about me that she did that. And I just can’t imagine anything lower than that.”

The actress also brought up the issue of gender in this circumstance.

"Would she say that to my husband? I can’t stand [it] when women say unfriendly things to other women," she said. "Why does it have to be like that? Why do we go from [I disagree with you] to I hate you, I attack you, I use words that I know are hurtful? And we’ve never met! You’d think at this point in my life I would be accustomed [to it], but we keep finding new ways of expressing ourselves, new outlets to be unfriendly and cruel."