The couple reportedly frequents the home of the prince's grandmother in Norfolk and enjoys spending quality time there away from the hullabaloo of the city.
Neither the Queen nor the Duke of Edinburgh stay at the home while Prince Harry and his 24-year-old girlfriend visit, however, per the Daily Mail.
But considering that the royals are opening up their private home to the 29-year-old's girlfriend, it's fairly safe to say that things are going well and getting serious with their relationship.
In fact, earlier this month an insider told E! News that the two are closer than ever and that Prince Harry is definitely talking marriage.
"Seeing Prince William and Kate [Middleton] get married and settle down has had a real effect on Harry," the source explained. "He's just seen how happy they are and he's realized that he wants that too."
And it appears that his feelings are being matched by his gorgeous gal pal as well.
Bonas is "very much up for getting more serious," the source added. "They want to remain very much as they are—with a private life away from the cameras. For now they want to enjoy as much time together before the seriousness of their relationship becomes public with announcements."
Another pal echoes the couple's affection for one another and shares that an engagement is most likely in the cards for them.
"He hasn't proposed yet, but it's only a matter of time…this is it for them both."
Sounds like a Sandringham escape is perfect for these two.