Responses
At the same time though this is the power that helped her survived so its reasonable she relies heavily towards it. It doesn't help either that Tarkan was never clear to begin with that he has "someone he loves" in the earlier chapters. What he cleared up was that he wasn't in a relationship with Diana but he never fully explained to her that he did have someone he loves (or is looking for).
Well she saw enough to know he’s in love with 2 people at the same time. Regardless of the context it’s not gonna feel great
Even if the power shows the truth, the truth she sees are incomplete and missing context. Treating a partial truth as if it is the whole thing is very unwise of her.