Can a man marry his brother's widow? The Bible is not clear in this matter:-
A man may marry his brother's widow
Deut 25:5 A man may not marry his brother's widow
I have a pair of relatives. Or had. Sometimes I forget how old I am. Anyway, the two brothers fell in love with the same woman. She married the older of the brothers, had two kids, they had a decently happy life with no major problems. Until he was electrocuted on his job. He was a lineman. The younger brother, who had never stopped loving her, but would never have even thought about disrespecting her or his brother by trying to have an affair with her while they were together, was of great comfort to her and her children. They had been quite close all those years anyway. After a decent time had passed, they did get married. They had a child of their own and had a happy, comfortable marriage and are, to the best of my knowledge, still together and quite happy. I cannot imagine why, for any reason, God would forbid love and happiness from happening. IF the Bible does say not to marry your brother's widow, and I can't remember it, I believe it may refer more to some of the societies at the time when a man was held responsible to marry his brother's widow and care for her family. Not a love match as such, but a societal custom.
This is the "Kinsman Redeemer." In the Old Testament, when a man died in battle and left behind a widow and orphan, his brother was supposed to marry her and adopt her child as his own.
If he was already married then he was authorized to have a second wife if he could support them both and their children decently. If there was no one, then the King was supposed to adopt her and take care of her for life.
That does not mean a consummated marriage. That means he had to care for her unless she decided that she wanted to make it a consummated marriage and could get along with the man's other wife.
If they were all comfortable with it, why not give them a blessing? That is what the Lord did in those days.
I still can't think of a house that is big enough for two women and I can't think of a woman who is willing to share her husband. Still if you have a family member and a spare room, then do as a family should do.
What is wrong with taking decent care of people in your family?