Am I A Bad Mum?

A mother of three has to choose being separated from her two other kids ages 11 and 8 to be with her youngest, a 3 year old, who has been very sickly and her husband who has been making foolish things in a hindsight. Even if she wanted to be with all her three children, financially she and her husband couldn't afford it. The two kids are left in the province with grandparents to look up to them while she and her husband with their youngest is living in the city. The decision to live with her husband in the city is to fix the now shaky relationship, giving it another try. Financially, they are hard ups and her eldest is begging her to go back in the province, but she refused, thinking if she does, her marriage will be completely doomed...Does this make her a bad and unworthy Mum?