Last year he finally acknowledged his seventh grandchild, but he has stopped short of communicating with her.
Since September, Navy has frequently spoken to her father during Zoom calls in which she picks out which of his paintings she wants (also part of the settlement) and the pair do arts and crafts together.
“I love my daddy”, she says, beaming in her floral dress.
Asked what her grandfather does, Navy becomes shy.
“He’s the president but I don’t know what he does, he just sits in the White House”, she says while climbing on top of her mother.
While the Bidens frequently talk about the importance of family, Ms Roberts has been devastated by how they have excluded their own flesh and blood.
Moments that have stung included seeing Christmas stockings hung in the White House for each grandchild – and even the dog – but not Navy.
Another blow came when Jill Biden dedicated her children’s book Joey to all her grandchildren – naming each one apart from Navy.
“It’s classless, it’s just tasteless, distasteful. It’s hard to understand the reasoning behind that, because what is the excuse?”, Ms Roberts says.
“As the matriarch of the family, what’s so hard [in] including one child?”
Ms Roberts adds that there is a passage in a book by Hunter’s ex-wife Kathleen Buhle where Mrs Biden asks everyone to get out of a photograph who isn’t “Biden blood”.
“If you’re so big on Biden blood, what’s wrong with this one?”, Ms Roberts says, shifting in her seat.
“She’s from the same lineage, and quite frankly, Jill isn’t Biden blood but she is.”
If Mr Biden is re-elected in November, Ms Roberts says she won’t push for her child to be involved in the inauguration, but added she also won’t watch it either because it would be too painful.
Security concerns
Another thing that concerns Ms Roberts about the way her daughter has been treated is her lack of security. She is the only first grandchild without secret service protection.
Ms Roberts’ new build home on a quiet cul-de-sac is decorated with cow hides, photographs of her with her daughter and canvases displaying uplifting quotes such as “find the joy in the journey”.
But among the Aztec-inspired décor, a serious arsenal has been hidden to ensure Ms Roberts is never far from a gun.
During the run up to last year’s election Ms Roberts said she had to call her father, “Rambo Pappy”, for help after she came home to find someone in her home on multiple occasions.
“I doubt every single mother is having to board their house up at night to barricade themselves in a room with 12 guns just to go to sleep”, she says.
“They don’t offer security, they don’t protect her in any way”, she says of the Bidens.
Even when we drive to a nearby pond for photographs, Ms Roberts shoves a handgun loosely in her waistband. She claims it is to shoot cottonmouth snakes in case they try to attack us.
Her armoury includes two shotguns behind the headboard, a rifle behind the door, a glock in each nightstand and a third under the mattress.
Ms Roberts says she is considering getting private security to protect her daughter, fearing she is an easy target if someone wanted to attack Mr Biden either ahead of the election or because of his stance on the Israel-Palestine conflict.
When we get closer to the election they will likely relocate to a “secluded location” that is inaccessible by car.
Being a mother to a first grandchild has also caused a wedge in her romantic life. She has dated two men, one of whom she has a restraining order against while the other said Navy’s father was a “piece of s—”.
Ms Roberts says she is the “black sheep of the family” when it comes to politics. She voted for Mr Biden in the 2020 election, but she’s not sure what she will do this year.
“I’m not a Trump supporter but voting for Joe at this point is also like endorsing my child’s unacknowledgement”, she says.
The next time she will come face-to-face with Hunter will be during his California tax trial, for which she has been subpoenaed.