No, it’s not right but she’s probably a poor woman who doesn’t have the money to place on her relative’s grave. The road is right there so she parks her car or has walked up the drive, sneaks some pretty flowers at the boy’s abundantly flowered site thinking no one would notice a few missing and walks on down the row to what is probably her recently deceased husband’s grave. Do a few fake flowers really constitute wasting tax dollars to get the cops involved? The relatives should just talk to her and find out her story.
Or, she's just...a thief. To a thief, the opportunity to steal is just that-an opportunity. The family sees it as desecrating the memory of a loved one. A thief sees it as "a great place to get free flowers".
I do not know why some people think some thieves are more honorable than others, and are aghast the someone would actually steal from a grave. Why do they break into people's cars and steal their Christmas packages? Why do they steal some disabled vet's wheelchair? Because they're THIEVES.
I seriously doubt she's stealing flowers for someone else's grave. If so, she is desecrating the grave of her loved one. "Here, sweetheart; I just stole ya some flowers from some schmuck's grave".