Trelawney's predictions in "HBP"?

[Jennifer]

No: HPFGUIDX 154430

I'm sure this has already been asked a million times but it's
impossible to look back over all these posts so I apologise if this
is repetitive.

I was wondering about Trelawney's predictions? Towards the end of the
sixth book she makes the predictions with the cards about "the
lightning-struck tower. Calamity. Disaster..." etc. I know she's a
fraud who is never aware of making proper predictions but this seems
to show that she at least reads the cards right even if she doesn't
really understand what they actually mean and would rather
concentrate on dramatic effect than figuring it out. What bothers me
(and this is so trivial that I'm almost embarrassed to ask) is a
prediction she makes with the cards earlier on in the sixth book in
chapter 10, " The House of Gaunt". At the beginning of the chapter
she says:

"Two of Spades: conflict. Seven of Spades: an ill omen. Ten of
Spades: violence. Knave of Spades: a dark young man, possibly
troubled, one who dislikes the questioner
".

Can anyone tell me if she's reading an event that happens later in
the HBP (like the Malfoy situation) or something else? Like I said
it's a bit of a trivial question but it's been really bugging me. I
cant help feeling I'm missing the obvious.

Jennifer