widows

Non-mahrams visiting a widow and seeing to her needs

Q:

1. My mother in law is presently observing her iddat. Owing to the fact that her son and husband have passed on and her brothers live far off, I take the responsibility of taking her out of the house for necessary needs e.g. hospital visits., etc. Am i allowed?

2. The second query would be regarding other ghair mahram men. Are they allowed to visit her at home? Is she allowed to go with them to any place that is deemed unnecessary? I think that she is not allowed to. She has recently left the house with an uncle of hers (not related by blood) for a few hours. Her reasoning is that he is an elder. Please clarify for me. Does my deceased father in law incur any azaab as well? 

Baseless belief

Q: I just wanted to ask on behalf of a relative if a woman becomes a widow and her husband leaves behind money, land and property, is she not allowed in Islam to spend anything, money/inheritance for a year after the husbands death? Is this a true in our religion or mentioned in a Hadith anywhere? What is the truth about this question.