The best theory on why the Kardashians have said nothing about Rob's engagement.

The Kardashian-Jenner women have been silent on the news of the sock entrepreneur and sole male heir’s new engagement, but don’t take that for dissent.

They just don’t think this wedding will actually happen.

Blac Chyna, 27, like any newly engaged woman in love, is extremely excited about her impending marriage, and plans to use her real name — Angela — along with her husband-to-be Rob Kardashian’s surname.

However, the sisters Kardashian aren’t concerned about the possibility of Angela Kardashian crashing their weird capitalist cult of a family, because Rob Kardashian, 29, is a serial proposer who will pop the question to any woman who’s put up with him for more than a couple of months.

According to TMZ, Rob Kardashian is the boy who cried groom, so none of his sisters nor his mother are too bothered about the Blac Chyna engagement.

The site reports he has previously bragged to his family about proposing to former loves Rita Ora and Adrienne Bailon, neither of whom he ever married.

Rob Kardashian has had many of these moments... Post continues after video.

It's unclear if Rob Kardashian was actually ever engaged to these women, nevertheless, the website reports, the family doesn't think the engagement will stick due to his propensity to propose.

Meanwhile, Blac Chyna's mum has some fairly harsh words for the Kardashians, which could make the wedding really awkward.

We thought it would be all love once #BlacChyna and #RobKardashian got engaged but Chyna's mom #MsTokyoToni is throwing shots at the Kardashian/Jenner clan and one of Chyna's best friends who wants to help plan the wedding ????

A photo posted by HOLLYWOOD UNLOCKED (@hollywoodunlocked) on Apr 6, 2016 at 4:51pm PDT

Apparently Rob Kardashian was so eager to affiance Chyna that he asked for her hand as soon as he got the ring from the jeweller.

According to jeweller Ben Baller, the proposal took place in his presence, just after he'd handed off the US$325K rock to Kardashian.

As we all now know, Chyna said she would indeed marry him, and I reckon that would be the first episode of Keeping Up with the Kardashians I would ever watch.

Stay tuned!