Selena Gomez’s social media accounts brim with adoring fans: two million likes for her most recent post showing her and her husband in a rose-petal strewn hotel, and thousands of comments praising her beauty, her lipstick and the perfume brand she founded.

This week the PR focus for the star – who rose to fame on the Disney channel but has moved into song-writing, films and TV drama – was supposed to be on the upcoming series six of Only Murders in the Building that sees its podcasting sleuths transfered to London for their next adventure.

But the wider chat – outside those friendly spaces – has gone off-script and is largely on a less flattering topic – namely claims from investors who allege she breached her contract by not properly backing the mental health platform Wondermind that she cofounded with her mother five years ago. As a result, the five investors argue, they were defrauded of the nearly $1.2m they invested.

Gomez is pushing back against those allegations – her lawyer has asked that she be dismissed from the case altogether, saying the claims made against her are “threadbare”.

The investors claim they were told that “Selena Gomez, one of the most famous women on earth, with a billion-dollar brand and a platform unmatched in social media, would be actively building the company as its head of marketing”.

Gomez’s attorney Matthew Rosengart says their allegations are “vague, generalised and contradictory” and that Gomez never agreed to, and did not, manage the company, or make the kind of commitments they are suggesting.

The emphatic pushback from Gomez may reflect a concern for her reputation but it also leaves her mother in the hot-seat, facing the fraud allegations alongside the company itself and a third co-founder.

Crisis PR commentator, Lauren Beeching, founder of Honest London says Gomez is far from the first celebrity to try working with a close family member. At times it can come off like in the Jenner-Kardashian household or with the tennis-playing Williams sisters.

But there are plenty of examples – from the Beckhams’ to Britney Spears – where family brands and business don’t mix well.

Working with close relatives, whether that’s a sibling or a parent, or someone else is almost always a higher risk approach, says Beeching.

“It can make the boundaries between the personal relationship with the business and the celebrity’s reputation much harder to separate,” she says.

The natural level of trust means that you might not apply the same rules as you would in a normal commercial relationhsip, so better guardrails are needed, she says.

“If you’re going into business [as a] family, I’d put more structure around it, not less, for sure.

“Define everybody’s responsibilities, bring in independent oversight, and decide what happens if something goes wrong before something goes wrong.”

“A family relationship shouldn’t be a company’s governance structure.”

At the end of the day Gomez may not need to worry too much over this case, says Beeching

“This will generate headlines because Selena Gomez is enormously famous, but I don’t think it’s the type of story her core audience is particularly interested in.

“There’s an important difference between generating negative headlines and causing lasting reputational damage. “

Still, for celebrities considering trading on their personal brand, she does have words of advice.

“Before lending your name to a company, don’t ask what your reputation could do for the business. Ask what that business can eventually do for your reputation as well.”