She's obsessed with SATC because its the lifestyle she always really wanted. Now she's stuck in a conventional, very stereotypical Irish Catholic marriage and children. Now she's realizing that it isn't what she really wanted but theirs no going back now. A little life depends on her forever. She wants to believe she's like Carrie, but she is more Charlotte, but on steroids. She wants to believe that she can still have that life, that dream, that adventure and excitement. She is missing that lifestyle of singledom, the ''rush'' in her sex life has probably gone by now, especially after having a child, things obviously change a bit. It won't make it easier that they'll be spending less time together, and he will be in other countries from time to time, and she won't always be able to be with him, especially once the little one starts school. The fire goes out in relationships and normality resumes, even to the sex. Most couples are absolutely fine with their sex life calming down over time, but Melanie is one of those that believe she should have an exciting, passionated relationship all the time. She sees how Carrie's lifestyle is and has always desperately wanted it but then she had a massive panic over nothing, and got pregnant and married all at once without thinking it through at all. Tough.
When she was younger, she should have got a visa to the US, New York, saved all that Youtube money, got an apartment and started a vlogging of her journey as an Irish girl in New York. That is the path she wanted to go, but it didn't turn out at all. That is how I've always felt when she talks about life. Now she's obsessed with wanting to appear like the Weasleys from Harry Potter, because she will eventually end up like that poor woman, cooking for a husband and several dozen kids, in a run down house. But she's promoting it as a fairytale. It ain't.
All us normal women who live very busy lives, or have children, partners etc know, it is hard, and a lot of times, you don't look your best, you don't have time, you have children to take care of, a partner who may not always give you the attention you want. Not because they don't love you, but because reality hits in, and people have stresses, worries, kids and work to deal with. You're just tired and want to sleep, take a nap, you don't want to bake cookies, you want to order a takeaway and clean up tomorrow.
That to Melanie is unacceptable, she wants it all, and she will learn eventually it doesn't happen. It's impossible. Celebrities have that, because they have a nanny who does most the work, they have hairdressers and makeup artists to do the rest and chefs to prepare their food. So they have very little to worry about. Normal people have to do all that themselves, so its not always possible to appear as though its all sunshine and roses.
Sex and the City was Melanie's dream life, with dream friends, in a reality that is only in her mind. She pretended to have a real medical condition that would make it hard for her to have children, but she made the whole thing up, twisted it around to fit her own narrative, so decided she needed to get pregnant now, and married because she has old fashioned views, she always has. She is a consummate liar.
Now she has to live with that lie. Which is her existing life. Sorry for rant, but I had to explain it somehow haha!