Mariah Carey and Nick Cannon remain quiet as split rumours swirl

and

's marriage has been

for some time – but the couple are keeping quiet on recent reports that their marriage is in trouble. The couple are well known for their

, but in the past few months have been

; Nick hasn’t tweeted anything about his wife since November, while Mariah last shared a family portrait to mark Father's Day in June.

© Photo: Getty Images

Mariah and Nick

after

, and have two children together, three-year-old twins

. But numerous sources are claiming that there is trouble in paradise."

," an insider told

. "This is not all of a sudden. There have been issues between them for a while. They are not getting along."She wants to end it and it has been in the works for month, which is why her house in the Bahamas and the house in Bel Air are on the market."

© Photo: Instagram

The couple are also currently having renovation work carried out on their $10million Tribeca home – and it has been claimed they are using that time for a

.Another source told

, "They're using the construction as a cover", adding, "

. But Nick's being more passive.

, perhaps because of the kids…"Nick's sensible and realises that the twins would have a more stable existence if Mariah has full custody. But he wants generous visitation rights."

© Photo: Getty Images

While the couple are keeping quiet about this recent round of rumours,

during an interview with

back in May."You kind of have to ignore it because every week it's something different," the TV star said. "And if you paid attention to it, it actually probably would start really affecting you…"

. It's kind of humorous, really.

..."