*Us Weekly is citing “multiple sources” who say Eva Longoria Parker and Tony Parker have split after three years of marriage,

In its newest issue, on stands Wednesday, the magazine claims Longoria Parker, 35, recently discovered that her husband, 28, has been exchanging personal texts with a mutual female friend for nearly a year — hundreds in just one month.

She plans to file for divorce soon, sources tell Us.

The magazine reports…

“Eva is heartbroken by the betrayal,” says one insider, adding that her husband confessed to the inappropriateness – which took place for nearly a year – after she confronted him.

Adds another friend, “Once the trust was lost, the marriage was over.”

Nonetheless, the decision to end one of Hollywood’s most affectionate and glamorous romances wasn’t easy.

“Eva truly thought she was going to grow old with Tony and have children with him,” adds the pal. “She’s inconsolable.”

Longoria Parker’s rep had no comment; Parker’s rep could not be reached.

For more – including Longoria Parker’s confrontation with the other woman and how he “does not want to end the marriage” – pick up the new Us Weekly, on stands now.