Is there an Islamic opinion on women working? This is based on the assumption that both agree that the husband should be responsible for the finances.

Islamically a woman is allowed to work outside of the house if the husband agrees. If she works from the house then she doesn’t need her husband’s permission. Yes, if work affects her family life, reduces quality time with her children and husband, or the children won’t have a good upbringing, then she should not work.