Step mom for 25 years children were 7 and up when you married the real mom was not in the picture you raised the children will you have to divide up everything with these children if your husband were?

Not unless your husband's Will states it. Although you have every right to be looked after should you become a widow, it would be nice if something was left to the children as well. The children should have the right to a few personal things of their fathers (or mothers should she have left anything behind which your husband may have kept.)