What are my duties towards my husband's family after his death, given that I am alone with my children in a foreign country?

We ask Allah to magnify your reward and compensate you with good. We have previously discussed the rulings concerning the 'iddah (waiting period) of widowhood in Fatwas: 33241, 32455, and 46969. Also, regarding a woman observing 'iddah leaving the house where she received news of her husband's death, and related rulings, in Fatwas: 38668, 41754, and 48770.