Are Bill Gates' daughters taking their mom Melinda's side in their parents' nasty divorce battle?
That's what fans want to know after Jennifer Gates, 25, and Phoebe Gates, 18, failed to wish their dad a Happy Father's Day, just one month after Melinda filed for divorce.
On Sunday, followers were quick to note Gates' daughters didn't pay tribute to their father despite being active on social media all weekend long.
Instead, Phoebe -- who just graduated high school -- paid homage to two other men.
Sharing a smiling photo cuddling up to two of her besties, Gates' youngest child captioned the playful snap by writing, "My best friends 💛 and favorite idiots."
Jennifer -- who is Gates' oldest kid -- shared several pics from a friend's wedding festivities.
Jennifer and Phoebe may have spaced out on Father's Day. The girls have a lot going on in their personal lives, despite their parents' ongoing $128 billion battle.
As Radar reported, Jennifer is gearing up to tie the knot herself and just celebrated her bachelorette party in Santa Barbara, CA.
The bride-to-be recently opened up about her upcoming nuptials, saying she can "can hardly wait" to marry the love of her life, Nayel Nassar.
It's not all roses for Gates' oldest child though.
After Melinda filed for divorce, Jennifer announced that she was postponing medical school to "recharge" her batteries.
While Jennifer is putting a pause on her education, Bill and Melinda's youngest child is getting ready to further her schooling.
Phoebe is off to Stanford after kissing high school goodbye in a mermaid-inspired dress.
Melinda filed for divorce from the Microsoft mogul in May after 27 years of marriage.
Bitter cheating accusations soon followed, and Bill admitted to having an affair 20 years ago.
Melinda and Bill share three adult children together.
According to reports, he's prepared to each of the kids only $10 million from his estate, which is a small chunk of change when he's worth nearly $130 billion.