The Geordie singer, who is currently filming the X Factor USA, split from boyfriend Tre Holloway in October - and appears to have remained single since then.
Sarah added that both herself and Cheryl are happy looking after their pet dogs, but could want kids in the future.
'I've got my dogs and I have my godchildren…They are my baby fix for now.'
'Maybe I should think about having kids at my age,' says Sarah, who is currently dating DJ Mark Foster, '[but] right now I don't even think I'm responsible enough.'
Despite this, the former Girls Aloud member says she couldn't be happier for her ex bandmates, Nadine Coyle - who had a baby daughter in February, and Kimberley Walsh - who recently announced she is expecting.
'She is going to be a great mum, she and Nadine are so family orientated.'
The blonde beauty also spoke of Cheryl's cheeky behaviour whilst on tour, saying:
'We always have great banter on stage and she loves grabbing my bum and giving me a snog. She's terrible.'