Eric Johnson and Tina Simpson celebrate her birthday Credit: Courtesy Tina Simpson via Instagram

Um...that's cozy! Jessica Simpson's mom, Tina, shared some birthday photographs on Monday, January 18 — one of which showed her hanging out with son-in-law Eric Johnson, his head on her crotch!

The photographs, taken in Mexico, show what a great, close relationship Tina shares with her daughters' other halves  but the snaps received mixed comments from followers!

In one picture, Tina is shown lying on a sun lounger, her arm up and her legs apart, while Jessica's husband Johnson, 36, lies in the same position just beneath her, his head resting between her thighs.

In the second shot, shared via Instagram by daughter Ashlee Simpson's husband, Evan Ross, Tina is also seen wrapped around her son-in-law, again on a lounger, but this time the 56-year-old mom is giving the man in her arms a smooch on the side of his cheek.

Happy birthday @tinersimpson. Love you!!! We are having the best trip ever!!!

A photo posted by Evan Ross (@realevanross) on

"Happy birthday @tinersimpson. Love you!!!" Ross, 27, captioned the photograph. "We are having the best trip ever!!!" he added.

"You guys are the best!" one commenter said of the fun birthday snaps.

"Happy birthday! Classic crazy moment," added another.

But some weren't quite so convinced! "Who puts there head in their mother in laws crotch. Lol," asked one follower.

"Well that's weird! Lol! Happy Birthday!!!!!" added another. 

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