The ‘Countdown’ presenter is currently dating Caroline’s dancing partner Pasha Kovalev, who she met when she was partnered with him on the show last year.
But while Caroline and Pasha’s routines are getting a big thumbs up from the judges - even bagging a perfect score for their salsa in Saturday night’s live shows - Rachel is reportedly less happy about watching them together, and is even “keeping her distance” from the pair while they rehearse.
Caroline Flack and Pasha Kovalev
A source told the Sunday People: “While Rachel completely trusts Pasha, it's a difficult thing to watch your partner spending so much time so close to someone else - especially when they are so flirtatious.
“Dancing requires a real chemistry which is why they've got so far in the competition - but it's tough for somebody to watch from the sidelines.
"That might explain why Rachel hasn't really been seen at rehearsals or the studios, although a lot of the other dancers' partners have been down to watch regularly."
He will, however, be heading out on a solo tour, ‘Life Through Dance’ later in 2015, which hits the road in March.
Caroline is one of four celebrities who remain in the running to take home this year’s glitter-ball trophy, following ‘EastEnders’ actor Jake Wood’s shock elimination on Sunday night.