The Bible is a book that is often taken out of context, because it is a book of many books... 66 to be exact. It can be tempting for the casual reader to pick up the bible and open it at any point, and read a story, and say that this is what the Bible teaches on this subject. That is not always a good way to look at the Bible. Actually, the Bible tells the story of the lives of many men, and women. We are told the events as they happened; the good, the bad, and the ugly. We see the events take place, and we see the repercussions. Often, we are given the moral of the story directly. But, at other times, we have to surmise from the principles, or rules that God gave earlier, and that Jesus gave later, what should have happened to make a better end for the characters. All in all, the Bible is composed of these stories, these rules or laws, and prophecies of things that will happen, or have already taken place.
The Jewish Bible itself is broken into the Law, the Writings (historical,) and the Prophets. It is called the TaNaKh, which is an acronym for Torah, Nevi'im, and Ketuvim, the three section names in Hebrew. Likewise, the New Testament can be divided as History, Letters to the Churches (which contained rules for behavior,) and Prophecy. It is from the Law or Epistles that we form our ideas of ethics directly; and from the Historical books that we analyze the lives of heroes of the faith, to see how they measured up to those teachings, in all their humanity. From there we should be able to apply the teachings directly to our own lives.
Joshua 15:16-19 And Caleb said, He that smites Kiriathsepher, and takes it, to him will I give Achsah my daughter as wife. And Othniel the son of Kenaz, the brother of Caleb, took it: and he gave him Achsah his daughter as wife. And it came to pass, as she came unto him, that she moved him to ask of her father a field: and she dismounted off her donkey; and Caleb said unto her, What do you wish? She answered, Give me a blessing; for you have given me the South land; give me also springs of water. And he gave her the upper springs, and the lower springs.
Caleb had been one of the twelve spies when the Hebrew slaves who'd fled Egypt first arrived on the borders of Canaan. Ten men had said that it was a great place, but that they were too weak to take it from the Canaanites. The other two, Joshua and Caleb, argued that they could take the land. The people wouldn't fight. So, God allowed them to all die in the wilderness outside Canaan, except for these two. Now, forty years later, here they were fighting and claiming the land town by town. Joshua had taken over in Moses' place, and Caleb asks Joshua to "Give me that mountain!" He was referring to Arba, which later came to be known as Hebron. He was given permission to take it, and led men in battle to claim it. He battled three strong cities, and defeated them, even though he was already an old man. They were rumored to be ruled by giants.
But, the fourth city was left to take. Probably, he was apparently concerned about finding a valiant soldier to provide for and protect his only daughter. He recruited a captain to lead men into battle against the remaining city of Kirjathsepher. He promised the prize of his daughter as wife to whoever was able to take the city for him. Interestingly, the name Kirjathsepher meant "City of Books," and it was probably a library or university town of the Canaanites. Othniel, Caleb's nephew, took the city for Caleb, and changed the city's name to Debir, which merely means "word." It seems Caleb had found the right husband for his daughter, one who would fit right in with his temperament. Caleb awarded the Conqueror his daughter and a part of his land as her inheritance. But, Othniel the Conqueror didn't get the last word on acquisitions and income for his family.
When Achsah, Caleb's daughter, arrived at her new house on the piece of land her father had given her and Othniel, for their honeymoon, she told Othniel he should ask her father for more than just the dry land of Debir. She knew the value of having a water source. She also knew what her father owned. She valued what her father had as much as he did. She was her father's daughter after all. She told her new husband to ask for a water source as well. It seems she figured her father would have to give her husband whatever he asked for, out of a sense of duty, since he seemed to be fond of Othniel the Conquering Son-in-Law. The account is sketchy with the details, but as you can see, when they got to her Father, he wasn't one for delaying. He turned directly to his newly married daughter, the apple of his eye, and he asked her point blank what she wanted. He didn't want to hear it from someone else. He loved his daughter. He would prove it, too.
She answered that she wanted a blessing, and since he had given her the south land, she wanted springs of water. He not only gave her one spring, but he gave her the upper and the lower spring, enough to water all their land. More than that, it would have assured that commerce would boom on their land, since travelers would set up shops near their springs, and pay rent for the land. This was a wise acquisition for her family, and children. Her husband seemed content to receive her advice. Later, in the first five chapters of Judges, we see that he became the first Judge of Israel. Her family prospered because of her wise planning and foresight. She turned a word into a blessing here in this life, simply by asking for more than she was given. Incidentally, I never read a word about her brothers.