New York, March 14 : Michelle Obama has her mother to thank for keeping their First Family grounded.

The First Lady revealed she could not determine the contribution made by Marian Robinson and was ever so grateful for helping the family cope with their changed lifestyle in the White House.

"It''s immeasurable. I think that all of our transition has been eased by her presence," the New York Daily News quoted her as saying on ''Good Morning America'.

"First of all, she''s one of the funniest people I know and she is so nonimpressed by any of this. She keeps all of our feet on the ground," she added.

The mum-of-two further expressed her pain on seeing the plight of military families who were sustaining themselves on free food stamps.

She said: "It hurts. It hurts. These are people who are willing to send their loved ones off to, perhaps, give their lives - the ultimate sacrifice.

"But yet, they''re living back at home on food stamps. It''s not right, and it''s not where we should be as a nation." (ANI)