Brazilian fashion model Gisele Bündchen and New England Patriots quarterback Tom Brady might be the next celebrity couple to divorce, if rumors are to be believed. Their marriage is on the rocks, despite appearing as the perfect couple in an Instagram picture for Brady’s birthday, OK! magazine wrote in an exclusive report Wednesday.

“Things between Tom and Gisele have been strained for a long time,” an insider told OK! magazine Wednesday. They have been haunted by the same problems for years, the anonymous person added.

But fans wouldn’t be able to tell by the way Bünchden posts about her husband and family on social media. They have two children together: Benjamin, 5, and Vivian, 2. “Happy birthday my love! We're so blessed to have you in our lives. Thank you for always giving us so much love,” the former Victoria’s Secret model, 35, wrote last week.

Gisele Bundchen Model Gisele Bundchen and professional football player Tom Brady kiss on his birthday. Photo: Instagram/Gisele Bundchen

The Instagram affection is just a façade. “Gisele is ramping up the social media activity because her marriage is breaking down,” the insider told OK! magazine. For instance, the couple reportedly fought on Brady’s 38th birthday and have yet to reconcile. If they were to split, it would be a $460 million divorce, the publication added.

While rumors swirled about the state of her marriage, Bündchen posted a cryptic quote to Instagram Tuesday. “People often forget that kindness is free,” the message said. She captioned the image for the photo with the same saying, but wrote it in Portugese.

If Bündchen and Brady, 38, were truly having marital woes, they would just be one of many celebrity couples that have divorced in 2015. Famous duos like Gwen Stefani and Gavin Rossdale, Ben Affleck and Jennifer Garner, and Miranda Lambert and Blake Shelton have all filed for divorce this year.

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