Lisa Vanderpump is a reality television powerhouse. Her personality shines strong on The Real Housewives of Beverly Hills, and her spin-off Vanderpump Rules can stand up on its own.

Apparently, however, Lisa has been really distancing herself from her fellow Real Housewives.

And it’s starting to piss them off.

In May, Lisa Vanderpump’s brother was found dead of a suspected drug overdose, though it was also claimed that had intended to take his own life.

Now, months later, she appears to be pushing away her co-stars on RHOB.

TMZ reports that Lisa Vanderpump is making minimal effort to interact with the other Housewives, off camera but also on camera.

She’s growing increasingly isolated, even totally ditching a photoshoot that the rest of the cast was doing.

Erika Jayne called her out publicly for blowing them off, but they’re all pissed. Why is Lisa doing this?

An obvious explanation might be her alleged feud with Dorit Kemsley.

Lisa Vanderpump is a huge animal lover. She runs a rescue, she has a foundation to support the rights of non-human animals — particularly, dogs and cats.

Lisa has a rescue, and Dorit adopted a dog from Lisa’s rescue.

The rumor was that Dorit dropped off the dog at some random animal shelter and that Lisa is feuding with her over it.

While that would leave Lisa (or anyone) pretty justifiably peeved, that is apparently not what happened.

As Lisa explained to TMZ, she and Dorit don’t have a feud going.

In fact, she says that Dorit didn’t drop off the dog at an animal shelter — she attempted to rehome the dog to a friend.

It was apparently this alleged friend who instead chose to abandon the dog at a shelter. Thankfully, all of the dogs from Lisa’s rescue are chipped so they were able to recover the dog.

When you adopt a dog, they become a part of your family. Dorit must have felt incredibly betrayed when this so-called friend ditched the dog.

But if Lisa doesn’t have an issue with Dorit … what’s going on?

Whatever beef is going on among the Real Housewives, TMZ is told that no one is sharing what it is.

Obviously, the franchise runs on feuds. Feuds are its fuel and lifeblood.

But unresolved tension that doesn’t play out on camera doesn’t do much good for the show — especially if the women can’t even film together.

We hope that whatever it is can be worked out, even if it gets played up for the cameras.

There is another possibility, however.

What if the sudden death of her brother shook Lisa’s world to the point where she no longer feels invested in The Real Housewives of Beverly Hills?

When you’ve lost a sibling like that, it can make you reevaluate your priorities.

But we have to say that it’s more likely that she’s just still grieving him. That is a very normal and healthy process, and it might mean that you seem a little distant from others.

If there is an actual feud behind it, though, we’ll be interested to learn the real source of tension.