Among some peoples of the Pacific islands , widows or widowers are forced to wear black clothing and go into mourning for months , locked up in a house where they must refrain from eating the deceased persons favorite foods .
The above sentence is very complicated. Please provide me a simplified synonymous version consisting of multiple sentences:
In some Pacific Islands , widows and widowers are required to wear black clothes and mourn for months . They must stay in the house and not eat the deceased's favorite food .