Feq Queries for Standard Visitor Visa - Sister Family

[UKVisit]

Hi Guys,

My apologies if it was answered earlier however I did not find any.

1. Do you have any family in the UK? (Required)
This includes:

immediate family - husband, wife, parents or children
grandparents or grandchildren
your husband's or wife's family
your child's partner or spouse
your partner, if you have lived with them for 2 out of the last 3 years

Now my question here is for my sister application. What should my sister say here that she has family in UK or not?

2. Will you be travelling in the UK with someone who is not your partner, spouse, or dependant?

What would be the answer of my sister's son here? No or yes.

Thanks in advance.