News surrounding Cory Monteith’s (Finn) death continues to get sadder. With the autopsy report revealing yesterday that Cory died of a mixture of heroin and alcohol, we're learning that girlfriend Lea Michele (Rachel) had no idea he was using heroin again.

Cory went to rehab in April to deal with substance issues, and Lea apparently didn't realize that he was still struggling to stay clean since then, according to Us Weekly.

"Lea has been inconsolable," a source reveals, adding that Lea "didn't know" that Cory had relapsed with heroin following rehab. 

"It's an absolute mess," another source says. "It's just devastating, tragic news. A lot of his friends in L.A. had no idea how bad his drug use was. Everyone is still shocked beyond belief." 

Back in April, we had reported that Lea had given Cory an ultimatum, saying he had to go to rehab or risk losing her.

“Lea gave him an ultimatum,” a source reported in April. “She said she loved him and she couldn’t watch him slowly kill himself, so if he didn’t get help for his substance addiction then she didn’t think they had a future.” As we all know, Cory agreed to rehab. 

We can't imagine what Lea is going through right now, both with the shock of Cory's death and the fact that he was apparently hiding his drug use from her. Our thoughts are with Lea and all of Cory's loved ones during this emotional time.

Source: Us Weekly