Yolanda Foster's Lyme disease diagnosis will once again raise questions tonight's The Real Housewives of Beverly Hills, but on Twitter, she's standing firm.

'RHOBH' Yolanda Foster's Lyme Disease Treatment Continues With Pot?

After a fan tweeted to Foster, noting online reports of her being cured, and some which claimed she was faking the illness, the reality star and mother of three offered the following response:

'RHOBH' Taylor Armstrong Reveals Why She Was Concerned About Yolanda Foster's Illness

Also this week, Foster's soon-to-be ex-husband, David, spoke out on her behalf.

"I am incredibly proud of Yolanda's determination and mission to find a cure, and how brave and open she has been by sharing her story in the hopes of changing the future for others," David told People Magazine in a report earlier this morning.

While several reports have suggested Foster may be exaggerating, or even lying, about her illness, David continues to stand by her, and told the magazine her struggles are very much real.

David also added, "I have always had and continue to have the utmost respect and love for Yolanda, which is why it is so frustrating to see headlines questioning her chronic debilitating illness."

For more Yolanda Foster, tune into The Real Housewives of Beverly Hills season six, airing on Tuesdays at 9 p.m. on Bravo, and learn more on her Lyme disease in the clip below.