Britney Spears' relationship with her fiancé Sam Asghari has been cruelly criticized after they added a new canine member to their family.

The 39-year-old pop superstar filmed a smiling Sam, 27, in a short Instagram video as he introduced her to their adorable doberman puppy Porsha.

The personal trainer and aspiring actor told Britney their new pooch would love them "unconditionally" and "protect" her from anyone with "bad intentions."

The singer added another dog to her family less than two months ago. It came after her other two dogs were returned to her after her former housekeeper initially took them away. The housekeeper claimed that they were "malnourished."

In his post, Sam put the lustrous black-and-brown pooch front and center as she got used to her new home.

"Surprised my fiancé with our newest member to the Family Porsha," he wrote, adding the hashtags, "#doberman' and '#homesecurity."

He also shared a sweet closeup of the dog placing her little paw in his palm.

Sam looked as if he was dressed for a workout in a video including in the post in which he introduced Britney to the pup.

"Who is the new addition to the family?" Britney asked while seemingly filming the clip.

"Her name is Porsha and she's meant to unconditionally love you," Sam replied, adding that the dog would 'be trained to protect you from any motherf***er that comes around you with bad intentions."

But some cruel social media commenters felt that Britney should not be left in charge of a dog.

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"God help this new doggy! He will be a victim of their obvious divorce," one shady person wrote online.

"She cannot look after herself and he's buying her a dog!" a second shady person added.

"A woman who cannot be trusted to have full custody of her children does not need another dog," a third commented.

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Meanwhile Britney has been confirmed she is writing a new book.

The "Sometimes" singer shared the plot line of her new fiction novel in a lengthy Instagram post on Friday, outlining a saga about a soul trapped between worlds.

Spears explained: "I’m writing a book about a girl⁣ who was murdered yet her ghost gets stuck in limbo because of trauma and pain and she doesn’t know how to cross over to the world she use to know !!!!'"

"After being stuck in limbo for three years, she is a ghost who thrives off of her reflection in her mirror for existence!!!! She has no one she can trust but something happens and she figures out how to cross over to the world where her family is!!!!"

"Coming out of the limbo she has a decision to make … greet the same people who murdered her or create a whole new life!!!!"

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