Kenyan Cultural Background
In Kenya, the culture is still heavily influenced by age-old male-dominated tribal traditions. (This is true of most third-world countries.) What happens when a Kenyan woman's husband dies?
Land in Kenya is owned by the husband. The husband's family holds first claim to his lands and goods. When a man dies, if he has living brothers, those brothers can (and usually do) lay claim to all his possessions. If he has no brothers, yet has a living father, the father can lay claim. So except in pretty rare circumstances, a man's wife loses everything when he dies-- land, home, and everything but her unquestionably personal possessions. She may even lose all rights to key decisions about her children, or even her rights to child custody. However, since raising children takes extra responsibility, she is usually left with all responsibility for the care, education, and feeding of any children.
Remarriage is usually out of the question, particularly if the woman is a Christian. By tribal tradition, she is expected to return to her husband's home village. If she is to remarry, she is expected to marry one of her husband's brothers to continue the family line. This is the tradition, even if all the brothers are already married. I cannot say with absolute authority that this one point is true of all African tribes, but it is certainly true of those I met-- They are traditionally polygamous. That is, one man may have many wives. This becomes a real stumbling-block if the widow is a Christian. She must make a decision.
She may either submit to the tribal tradition, or stand against it. If she chooses to stand against tradition, she will face harassment for a time. Hopefully this will quiet down after months or years. In some cases, though, no matter where she moves she is hunted and pursued by her husband's family.
If she not only defies tradition by not returning to marry a brother-in-law, but also chooses to remarry outside of the family or tribe, matters can become worse. In this case, her husband's family will usually lay their claim to her children. They will insist that her children be given to them to be raised in the husband's family, rather than under a new father from a different family.
The intensity of harrassment now becomes very heated, and often leads to violence.
So in all but the rarest of situations, a widow remains a widow. Remarriage is simply way too costly.