I know of a couple that are first cousins. They got
married and are now in their 10th year of marriage with
3 boys. One of the boys was diagnosed with ADD and
one other has a mental instability (they're in therapy).
The pressure, stress and probably guilt has put a
strain on their marriage and they're thinking of separation.
Their mothers are sisters and it has brought turmoil
and pain to all involved.
The sisters were very close at one point, however due to
the marriage problems their daughter/son have, they're
not on speaking terms right now.
It has driven a wedge throughout the whole extended
family and no one knows how to cope with it. Very sad
for a once close knit family.