Lisa was an older friend who had early onset Alzheimer's. When her memory problems got severe her sister asked for a loan and my friend pulled thousands out of her 401k.

The sister realized that Lisa could not remember giving her the loan after a few weeks, (much less remember to ask it be repaid) and came back asked for loans eleven more times. Lisa's 401K was almost completely drained and she was left with a huge tax bill that finished it off. She ended up on Medicaid the last years of her life.

May the sister rot in hell.