Ok new here but need outside advice. I've been living with SO for about 3 yrs. She has 2 kids 21boy and 17 girl. I have 2 girls 12 and 14 who live with ex. SO has ex out of state owes money blah blah blah. Owns her home works and does well. I work and do well also. Our main issues are always money. It seems. Son pays no rent girl has no job so she basicaly supports both cars food etc. Bot works full time. We have completely seperate accounts and bills. I pay my support and help with bills food etc. How much should I pay her. We don't really know how or what amount.