The liver's function is to produce bile juice which is alkaline in nature i.e. the pH of bile is more than 7. The function of this bile juice is to emulsify (the process of making two immiscible liquids as miscible) fats within our intestine. For emulsification, large fat molecules are broken down into smaller fat droplets which are rather soluble in water. Subsequently, in order to digest these small fat droplets, they are broken down into their component parts i.e. glycerol and fatty acids.
But, when somebody's liver ceases to work, it is unable to produce bile juice as a result of which fat is not digested in the body and these fat molecules then tend to accumulate under the skin in the adipose tissue of various body parts especially in abdominal, thighs, hips, chest region. If mrs. f's body is gaining excessive weight then it is possible that her liver is malfunctioned.