Can I trust them?
Trust is not one thing. There is what someone intends, what they are capable of right now, and what they are telling you — and the cards separate those cleanly.
Most readings on this question come back with a distinction rather than a verdict, which is the honest answer.
We'll read this as: What is this relationship built on right now?
Cards that often come up
The High Priestess
Something known and deliberately not announced.
The Moon
Not deception — fog. You are reading between lines.
Seven of Swords
Taken quietly rather than asked for.