But she wants to protect Luca and the best way to do that is to know what the enemy is planning. It's nice that she can decide for herself and not just follows other ppl around. She just sees Luca as a child so she may not take his advice too seriously, it's adult mentality
I get that but she has almost no power here. She's the supposed mother of the heir but she's seen as a commoner. What is she going to do? ML has actual power and influence, and even Luca has more sway, even as a child. I'd argue it's almost not adult mentality, because she's seeing herself as a plucky heroine who's going to help Luca, despite having very little actual social power to do so.
I hate when MC's go against smart advice. She should avoid him. Luca clearly doesn't trust him, and neither does ML, so it's not like she had to meet with the villain to get Intel to convince them he's bad. Just avoid him, don't let him get an angle on you, and let ML and Luca handle it.