@JWChibi She does have 53 lives worth of experiences and job training, and we can assume some of them weren't labor intensive so a weak body shouldn't be an issue. Plus if she ends up dying she's going to be transferred into another body after this one, so she really has nothing to gain by staying in a living situation that was so bad the Rubia before her died from neglect.
@silentscarlettt that's prolly bc if the man wasn't able to accept the death of their loved one, ofc they'd blame it on the one that killed her which is the child
@SleepyAbra , as @FinalFortuna said, "She does have 53 lives worth of experiences and job training, and we can assume some of them weren't labor intensive so a weak body shouldn't be an issue."
and abt her marriage situation, marrying someone of such status would burden her with responsibilities such as appearing in high society, managing whatever the lady of the house has to do. ofc it'd be a different issue is the prince dotes on her but we could only assume the former