Yes I agree that sienna is useless, she has no confidence or the power to speak, she is very weak and she is a nuisance but, just imagine yourself in her position. If you found out your daughter has been attacked and could possibly get killed, would you not worry? And she also lost her son, so of course she would have fear of losing her only child left. She knows very well how powerful roxana is and that she won't die, but, is it not a motherly instinct to go and look for your child when they're in danger? Also don't get me wrong I love roxana sm but I think she should have been a little more sensitive considering how soft her mother is
I love women<3
Spoiler!
I love roxana and raiden ei sm