Probably, But ideally not. Of course I am taken, so it is a purely academic thought.
I mean the thing is, a relationship with said woman would require some sort of relationship with her children, and the boundary lines are different in every parent-step parent-child relationship and I am not a person who enjoys such ambiguous relationships, this would be ever further ambiguous since it would be a lesbian relationship and society doesn't seem to know how to deal with lesbian families, which could lead to pressure from the children's peers or authority figures as to which one of us is their "real" parent, etc.