I was thinking more along the lines of her being cut off. Like, she goes missing for nearly a month, it's reported she moved out of the White House... Did she "leave" Trump? She's penniless without him. Therefore, Zara.
OK, I'll take my tinfoil hat off now.
I mean it's pretty obvious the marriage is loveless, sure. It was purely a transaction - Trump gets a hotass mail-order bride, and she gets financial security.
I keep hearing this narrative that Melania is depressed or whatever...I dunno, man. Outside of America, it is extremely common for women to marry not purely for love, but for security, and honestly more power to them. There are hundreds of thousands, millions even of women who are in a loveless marriage but stay because it's better than getting kicked out and dying alone (in countries where it's uncommon for divorced women to get married again) and without prenuptial arrangements.
Melania's the First Lady. With this administration, it's always been about 'winning' the presidency, fuck everything else. Her wearing that jacket is a conscious move, definitely.
edit: I rambled on too much. Here's an article from legal experts using New York law theorizing what would happen if they divorced:
https://www.townandcountrymag.com/society/politics/a14481104/melania-donald-trump-divorce/