Kyle Richards feels threatened by Yolanda Foster.

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After getting to an argument with Foster on Tuesday's new episode of The Real Housewives of Beverly Hills, Foster appeared to threaten Richards, claiming she may have information about Richards in her "vault," and in Richards' blog, she re-addressed the situation with fans.

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"Yolanda saying 'I hold a lot in the vault, Honey' was an absolute threat. No matter how she may try to spin it. Nobody says that in that tone for any other reason," Richards told readers of her Bravo TV blog earlier this week. 

"Later, I was surprised to receive the email from Yolanda with ALL the women in our group copied," Richards continued. "She always makes such a point to say, “If you have a problem, come to me directly, and we will talk in private.” The fact that she needed to alert all the women that she was chastising me was ridiculous. She is not my mother, and the way she spoke to me at Frida and in her email, with an attitude of superiority, was off-putting to say the least. I did not reply, because I would have far more appreciated her calling me and having that discussion on the phone or in person."

For more Kyle Richards, tune into The Real Housewives of Beverly Hills season six, airing on Tuesday nights at 9 p.m. on Bravo.

Tags: kyle richards Bravo Reality TV The Real Housewives of Beverly Hills yolanda foster