I’m curious about what duties might automatically be assigned to in relation to the stepchildren when you marry someone with children. (Assume here that you don’t formally adopt the children.)
Do you have to provide them with the necessities of life? Food/shelter/clothing and such?
What about extras, say, ballet lessons or dues for team sports?
How about college costs?
Does it differ depending on the age of the child at the point you married their parent?
If you later divorce the parent, can you be made to pay child support?
I know there is ‘common law’ marriages in some states, where you considered married after living as husband and wife for some number of years. Is there something similar where if you’ve acted as a child’s parent for X years, you are considered to be their parent, with the usual rights and duties?
(This is just idle curiosity.)