The socialite and mother of Brittny Gastineau, her co-star on their family show Gastineau Girls, revealed all in a series of tweets to fans online, blaming her own clumsiness for the incident.
Taking to her Twitter.com page, she writes, "Clumsey (sic) me tripped in the dark and fell up the steps. Put my hands out to break the fall - got to meet all the cute ER docs.
"I can now definitely say that broken fingers hurt more than a broken heart."
Lisa Gastineau hit the headlines earlier this year (10) after Brittny broke the news of her mum's secret skin cancer battle. The 50 year old underwent surgery to remove cancerous cells from her face last October (09) and went under the knife again in March (10) to rebuild her nose following the medical treatment.