Hmm...my memory and Memory Alpha says different
I can’t see it in the transcript.
There’s just a reference to receiving a personal message, and then:
PICARD: Oh, it's just family matters. ...You never met my brother and his wife, did you?
(Picard opens a photo-album that he had been studying)
TROI: No.
PICARD: Robert. ...So opinionated. So pompous and arrogant. He always had to have the last word. But he mellowed a little bit in the last few years. I was going to get together with them all next month on Earth. I thought we'd go to San Francisco. René's always wanted to see Starfleet Academy.
TROI: René? Oh, your nephew.
PICARD: He's so unlike his father. He's a dreamer. Imaginative. ...Very gentle.
TROI: What's happened?
PICARD: Robert and René, they're... ...burned to death in a fire.
http://chakoteya.net/movies/movie7.html
Nothing about Marie as the sender, or as a victim.