Is Eva Mendes getting upset over her boyfriend Ryan Gosling spending so much time with his La La Land co-star Emma Stone as they promote the film?

A new report in OK! Magazine seems to suggest that it's the case, with claims that Mendes, 42, is getting upset and worries about her 36-year-old's flirty and friendly relationship with his 28-year-old three-time romantic lead co-star.

"It's almost like she's threatened by their chemistry. He's reassured her she has nothing to worry about," a source said.

Mendes is allegedly concerned because the two spend so much time together now that their promoting the film as often as they are, and the source claims that the situation has gotten so tense that when he's home with her and their two daughters, Esmeralda and Amada, he doesn't even bring up his co-star so he can avoid a nasty fight.

"Ryan doesn't dare bring Emma's name up at home anymore, because each time he does, Eva gets upset and they get into an argument," the source said.

However, Gossip Cop has been able to confirm that it is just a rumor, and Mendes is in fact not jealous at all of the relationship Gosling and Stone share, and she's been supportive of their working together as much as possible. She and Gosling have been dating since 2011, the same year the first film Stone and Gosling starred in together, Crazy Stupid Love, was released. The two also starred in Gangster Squad together in 2013, before working on La La Land.  

The newest film will hit theaters Dec. 9. Both Gosling and Stone received Critics Choice Award Nominations for the film.