Love takes time and sometimes does not develop at all. This is an enduring myth, is our fables and fairy tales. There is, of course, no truth to this. But it can be a stumbling block to overcome, as an initial prejudice that affects the relationships. Children remain loyal to both biological parents and usually want and need to maintain good relationships with both parents.
Stepparents formed after a parent dies are easier.
Loss of a parent or of a spouse is very difficult. Starting the new family can oftentimes reignite the grieving process around the lost spouse or parent. This grieving can complicate the building of new relationships. There may be a desire on the part of the blending family to build the same kind of family they have already experienced. This, however, is a new family and will look, act and be different.