When it comes to travel insurance, there's a pretty strict definition of what counts as a "close relative".

Here's the (pretty hefty) list. To be a close relative, someone has to be your:

• Mother
• Father
• Sister
• Brother
• Fiance(e)
• Wife
• Husband
• Civil partner
• Domestic partner
• Daughter
• Son
• Grandparent
• Grandchild
• Mother-in-law
• Father-in-law
• Son-in-law
• Daughter-in-law
• Sister-in-law
• Brother-in-law
• Stepfather
• Stepmother
• Stepdaughter
• Stepson
• Stepbrother
• Stepsister
• Next of kin
• Guardian