A woman playing with play equipment while a child looks on.
Mother demonstrates how to use equipment to her son.
woman doesn't mean mother
A women does not imply a Mother. Playing with equipment does not imply that she is demonstrating. A child does not imply that it is her son.
The woman and child aren't said to be related at all and the child's gender isn't given, so you can't be sure they are a mother and her son. She could be playing with the equipment for fun; there is nothing indicating she demostrates how to use the equipment to the child.