One of these rules is that each adult person shall have one place strictly his of her own.

Another is a rule, so difficult for some aged persons of both sexes to obey, namely, that each person married is doubly entitled to individual choices in action without interference even from parents, since each such married person has to adjust his or her ideas to another person.
To work out full agreement between themselves is all that any married couple should be expected to accomplish.

Hence, in the nature of things, the grandparents who are so near the new family that they know and see everything have a far more difficult role to play than do the grandparents who have their own home and simply visit and are visited.
It is, however, often a necessity of financial provision and often a choice of ease in ministration to the needs of the aged, that brings one grandparent or even two within the daughter's or son's household.
The time-worn jokes about the "mother-in-law" are based upon the fact that it is more often the daughter than the son who is expected to or needs to personally care within her own home for the mother.

The son is not so bound by social custom to take his mother in.

Hence, more husbands than wives have trials with their parents-in-law.
=Reasons Why Husbands Desert Their Families.=--The statistics of deserting husbands, as compiled in a careful study made by Lillian Brandt and Roger Baldwin, show that among the chief causes of "leaving home" is "trouble with the wife's relations." In these cases it is not only the grandmother, although she is often a member of the disturbed family; it is also often other relatives--a sister, a brother, or a first husband's people--who cause trouble.