Lin seemed to confirm that in a series of posts on social media over the weekend. But then again, maybe not.
Lin, 40, was travelling in Japan with her actress friends Shu Qi and Kelly Lin last Friday when Shu Qi posted a photograph of the trio sitting with their backs to the camera and with the text: "Travel by four girls".
Actress Ruby Lin (far left) with her actress friends, Kelly Lin (centre) and Shu Qi. PHOTO: Weibo/Shu Qi
Fans took that as a giveaway that Ruby Lin is carrying a girl.
But it was then revealed online that trio were indeed travelling with another woman, who was not in the picture, and a man.
Still, Lin kept fans guessing when she later shared a picture of pink balloons on Facebook - with pink being associated with girls - and writing: "Girl Power".
On Weibo, she also repeated that line while sharing Shu Qi's post, this time not forgetting to add emojis of four little girls and four hearts.
As if those hints were not enough, she also shared pictures of the three holiday-makers which were posted last Saturday by Kelly Lin.
Echoing Kelly Lin's caption, "Girls just want to have some fun", she wrote "Fun Fun Fun", while adding, not three, but four heart emojis.
Said to be five months pregnant, she is pictured in one of the snaps with her tummy shielded by her friends. She has been sidestepping questions about her rumoured pregnancy since she married actor Wallace Huo in July.
Earlier this month, actor Huang Xiaoming also set off baby congratulations when he posted a photo of himself and his wife, actress Angelababy, on holiday. The picture showed the two facing the sea on a yacht and he had written: "Travel by three. Will do it together many more times in future."
They held their civil marriage in May last year and nuptials in October.
This article was first published by The Straits Times on October 17, 2016. For more stories like this, head over to www.straitstimes.com/lifestyle.