The MTV gal, who is currently dating former X Factor star Casey Johnson, took to Twitter before uploading a shot of her in the shower.
Stripping to her birthday suit, Marnie, 27, laid herself bare as she posed under the water.
Standing to the side, the reality TV regular proudly flaunted her baby-bump in the shot.
Keen to keep the image as family friendly as possible, Marnie protected her modesty by using her arms to keep her imitates covered up.
She completed her look by sporting a larger-than-life pout.
Marnie captioned the shot: “Using my soap bar guys, it’s 100% vegan and filled with natural ingredients, perfect for sensitive areas.”
She added: “It’s been perfect while i’ve been pregnant.”
Within minutes, the post was flooded with hundreds of likes and comments.
Marnie is expecting her first child with Casey Johnson.
The youngster is due in October.
Marnie and Casey have been on and off since June 2017 after meeting on dating show Single AF.
