Cardi B is desperate to have sex - but fears she doesn't have enough "breath" to last very long.

Cardi B

Cardi B

The 'Bodak Yellow' hitmaker is heavily pregnant with her first child with husband Offset, and has confessed she's struggling to get intimate with the Migos rapper because she runs out of steam every time they try.

Cardi spilled to her 3.37 million followers: "I wanna have sex but i loose my breath Soo fast [sic]"

When a user suggested she could wear a breathing mask in bed, Cardi replied: "you're on too something (sic)"

However, the 25-year-old star insists that her bump is "too big" now to make intercourse enjoyable.

One follower wrote: "But pregnant sex is the best sex", to which she responded: "Not at this last stage ..Baby too big (sic)"

Cardi - whose real name is Belcalis Almanzar - hit the headlines last week when she confirmed that she the 26-year-old hip-hop star had secretly tied the knot nine months ago.

The former 'Love & Hip Hop' star revealed she had no make-up or wedding gown on when they said their vows in a bedroom, but liked the idea that it was private.

In a lengthy note on Twitter, Cardi said: "There are so many moments that I share with the world and then there are moments that I want to keep for myself! Getting married was one of those moments!

"Our relationship was so new breaking up and making up and we had a lot of growing up to do but we was so in love we didn't want to lose each other, was one morning in September we woke up and decided to get married.

"We found someone to marry us, and she did, just the two of us and my cousin.

"I said I do, with no dress no make up and no ring!

"I appreciate and love my husband so much for still wanting for me [to] have that special moment that every girl dreams of when he got down on his knee and put a ring on my finger and he did that for me!! [sic]"

The 'Bartier Cardi' hitmaker accompanied the message with the tweet: "This why i name my album 'Invasion of privacy' cause people will do the most to be nosey about your life [sic]"