After their mother’s death, Guilfoyle found herself having to fulfill a maternal role to her younger brother.

“My mother was brilliant.

The latter she managed with the help of some kind neighbors who drove her to the supermarket.

Kimberly Guilfoyle smiling

“Mom and dad would be very proud!”

In an added hashtag, she affectionately referred to him as her “baby brother.”

In a 2020post, Guilfoyle shared another snap of her and Anthony in celebration of National Siblings Day.

Kimberly Guilfoyle smiling

“To the best brother in the whole world.

I love and adore you and appreciate you so much every day.

You are the smartest, most loyal, hardest working person I have ever met,” she wrote.

Kimberly Guilfoyle and Donald Trump Jr. standing on stage

“You make the impossible a reality.

It’s a honor to be related to you.”

Perhaps Anthony is not a Trump fan.