Melania Trump married husband Donald Trump on January 22, 2005, making their 13th wedding anniversary last Monday.
However, neither Melania nor Donald marked the special day on social media, even though they are known to use Instagram and Twitter respectively.
Nor is anything known of whether the couple celebrated the occasion together.
It was, however, mysteriously announced on Monday – the day of the anniversary – that Melania won’t be joining Donald in Switzerland for the World Economic Forum.
She pulled out last minute, and it was down to “scheduling and logistical issues” according to a spokeswoman.
Another time Melania did not acknowledge her husband was in an Instagram post celebrating the anniversary of Donald Trump’s inauguration over the weekend.
She wrote: “This has been a year filled with many wonderful moments.
“I’ve enjoyed the people I’ve been lucky enough to meet throughout our great country & the world!”
Donald himself was not mentioned in the post, nor featured in the picture, which was of Melania and a military expert.
However, yet again she did not mention the President himself, husband Donald Trump.
Their underwhelming response to their anniversary comes in stark contrast to the former US President, Barack Obama.
Barak posted a heartfelt Instagram post last week on Michelle Obama’s birthday, referring to his wife as his “best friend”.
“You’re not only my wife and the mother of my children, you’re my best friend.
“I love your strength, your grace, and your determination. And I love you more each day. Happy Birthday.”
Last week, an analysis of Melania Trump’s handwriting suggested Melania has certain personality traits that we previously knew nothing about.
The expert said it is possible Melania, despite her model background and her marriage to the US president, has feelings of “inadequacy”.
“When a signature is written with extremely tall capitals, it means Melania is afraid to see herself realistically.
“They are like bursts of excessive self-assertion which try to offset feelings of inadequacy.”