How can I make my wife feel better ?

My wife was watching a show about a girl who was bitten by a shark at the beach she's always been terrified of sharks ever since she watched Jaws. She would not survive a shark attack because she gets scared so easily she can't stand sharp pains like needles so she wouldn't be able to handle a shark she wouldn't know what to do she'd probably end up having a heart attack and dying. She couldn't do it this is why she's scared to go to the ocean we also have an almost 2 year old son she's scared for him too. She wants to get over her fear so she can surf she's always dreamt of being a surfer but because of her mental disabilities and heat problems she's worried she can't do it also she's already almost 30 so she thinks she's too old to start surfing. Her cousin is obsessed with sharks she loves them she doesn't get why she likes something that can attack or kill you. How can I help her get over this fear ?