United Kingdom, Feb. 6 -- Lisa Vanderpump is expecting to become a grandmother again "very soon".

The 64-year-old reality star's daughter Pandora - who is married to Jason Sabo - is heavily pregnant and Lisa admitted that she is ready to "run to the phone" as the due date approaches.

She told People: "I'm on baby watch right now! If the phone rings, I run if it's going to, but it is very soon.

"I was in Vegas. I spent a lot of time in Vegas. We just opened a new restaurant there and I came back. I thought it's going to be any minute. So yeah, if the phone rings, I'm gone."

The 'Vanderpump Rules' star - who has been married to Ken Todd since 1982 and also has 33-year-old Max with him - is already grandmother to three-year-old Teddy thr...