It’s not uncommon to find parents and grandparents living together with everyone minding the young. In fact, by many cultures, this is a very normal situation that works well for everyone. It tends to work best when everyone knows his or her place and it is clear who is responsible for what.
For other families the choice for parents and grandparents to live together may be less culturally determined. The situation may be to provide financial or social support either for parents or grandparents and sometimes both. Neither party may feel the situation is by choice, but by necessity.
In some of these cases, care of the young can become a battle between parents and grandparents.
Grandparents may overstep their bounds or feel the parents are inadequate.

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In the 1970 and 1980’s there was a style of family therapy that concentrated on these kinds of family problems and was known as structural family therapy. A basic tenant of structural family therapy was that families are organized in a hierarchy and that stepping outside the natural family hierarchy can give rise to distress. In other words, parents should parent, grandparents should support at the discretion of the parents. Indeed even when parents are inadequate, when grandparents step in uninvited, problems and conflicts tend to escalate.
The challenge in these situations is to come up with a set of rules between parents and grandparents that clearly stipulate roles, responsibilities and acceptable child rearing practices. In family therapy terms this is partly referred to as boundary formation.
Families unable to negotiate a set of rules themselves are advised to meet with an experienced family therapist. The role of the therapist is to understand and honour the family as a whole, including their living arrangements and then to help them arrange themselves so that it is clear who is responsible for what and what is acceptable with regard to the care of the young.
The process may be intimidating for some families, however the rationale makes it worthwhile. Families attend counseling for the good of the young. Children need parents and grandparents to have clear boundaries so they can operate within the family rules too. Children find safety and security when family rules and boundaries are clear and this reflects in happier, better-behaved kids.
Setting good boundaries doesn’t mean grandparents cannot have authority, but their authority is best delivered and observed when provided forthrightly by the parents. Where parents are struggling and grandparents can offer appropriate support it may be wise to accept it in the interest of the young. Similarly grandparents who have a tendency to overstep their bounds are cautioned that their behaviour doesn’t bring distress to the family. The one thing neither parents or grandparents seem to want is conflict. This is often a good starting point for dialogue, with or without a family therapist.
Read Direnfeld’s book, Raising Kids Without Raising Cane.