Her mum Joan was seen at a Newcastle branch of Mothercare over the weekend and appeared to be buying maternity pillows.
Cheryl's mum Joan Callaghan was pictured at Mothercare in Newcastle
The Sun reports that Joan asked a shop assistant for advice about a maternity pillow. The employee then came back with another one she recommended. Photos of Joan paying at the till have also surfaced on Twitter.
While fans were quick to comment that Cheryl is pregnant, others were more sceptical as Joan has four other children.
"Oh it's obvious then that's Cheryl's pregnant!!" wrote one Twitter user sarcastically. "This mum has other kids so therefore has other grandchildren or even friends with babies."
The singer has not been pictured in public for months
Cheryl, 33, enjoys a close relationship with her mother and earlier this year in March she spoke out in defence of her mum. Joan was pictured enjoying a night out with Cheryl and her boyfriend Liam, which sparked rumours about her involvement in her daughter's love life.
Cheryl tweeted: "There have been a lot of unfair comments about my Mam today and I have to clear a few things up in her defence.
Cheryl and Liam Payne have been dating since December
"While I am extremely close to my Mam and respect her entirely, she does not and never has had any influence in any of my relationships. As a (then) 32-year-old woman I make my own decisions and choices and take full responsibility for them."
Minutes later she wrote: "Just an FYI... I wasn't out last night for a "romantic dinner" I was out celebrating [a friend's] 30th birthday with everyone we love. #facts."