The 31-year-old rapper - whose real name is Stephen Manderson - has admitted he constantly ''nags'' his spouse, 26, to get rid of her excess clothes and can't believe it when even more garments arrive at their house.
He said: ''I've been nagging Millie since before we moved in together to whittle down her wardrobe.
''She gets sent stuff all the time - I should know, I'm at home trying to write a f***ing song and a f***ing delivery man turns up. That's why I've built a shed, where I won't be able to hear the doorbell.
''The other day, she spent four hours sorting it out. One of the piles was higher than my waist - it just looked ridiculous.''
The 'Read All About It' hitmaker thinks their relationship would make for an entertaining TV show, but they have always vowed not to open up their homes to the cameras.
Speaking to Heat magazine, he said: ''We've always said we wouldn't [do a TV show]. But s**t does happen that should be on a TV show. I enjoy having secrets. I enjoy our relationship being ours.''
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