Blake Lively, Taylor Swift and Brittany Mahomes (Photos via Imagn Images)
Things got messy fast when the behind-the-scenes drama of It Ends With Us exploded in August 2024, dragging co-stars Blake Lively and Justin Baldoni into an ugly legal showdown. But the fallout didn’t stop at lawsuits and production halts. It sent shockwaves through celebrity circles, including one of Hollywood’s most adored friendships, Lively and Taylor Swift.

Swift and Lively, once known for their close bond and holiday gatherings, suddenly found themselves on opposite sides of an escalating legal mess. And now, an unverified but viral post from Instagram commentator Katie Paulson may shed some light on what really tore them apart, and why Swift backed away when things heated up.

The Girls Trip That Sparked the Rumor

Taylor Swift and Brittany Mahomes (Photo By Mark J. Rebilas-Imagn Images)
According to Paulson’s post from April 2025, an unnamed source claimed the info came straight from a girls’ trip involving Brittany Mahomes, wife of NFL star Patrick Mahomes, and several friends, including Swift. The source alleged that Brittany was passing around a particularly sharp gossip: that Blake Lively may have tried to initiate an affair with Baldoni during filming. If true, that might explain Swift’s decision to distance herself from Lively once legal tensions boiled over. The implication? Swift might have been the one who had shared the rumor initially.

Though unconfirmed, this story adds fuel to the ongoing tension between Lively and Baldoni. What’s clear is that Lively and her husband, Ryan Reynolds, launched serious legal claims against Baldoni, including accusations of inappropriate behavior on set and an alleged online smear campaign. In that context, rumors about an affair sound more like tabloid noise than anything grounded in fact.

Despite the swirl of gossip, things appear to be smoothing over. A source close to Swift told People that she felt blindsided by being pulled into the feud but never saw it as a permanent break. “Blake knew she and Taylor would come back from this at some point,” the source shared. The report also noted that Swift feels “relieved” to have put the drama behind them.

Whatever the truth behind the falling out, the two seem committed to moving forward. As for the rest of the story, only they really know, and maybe Brittany Mahomes.