Raikkonen's mother, Paula, said she was surprised late in 2011 when she read rumours her 33-year-old son was thinking about returning to F1.
"I had heard rumours of his talks with Williams, so I asked him about it," she is quoted by the Finnish broadcaster MTV3.
"He said he would prefer to go to Lotus, because it was a better option for him. It was a surprise," she said.
"His friends had told me that he stopped formula one because he was tired (of it), and then suddenly he went back.
"I think the little break was a good thing, because now he seems to be enjoying the racing again," she added.