At the point where you have a family, the kitchen (providing you have a good, large, kitchen) becomes the heart of the home.
Firstly, it's where you cook and nurture the physiological needs of your loved ones
Secondly, it's where you eat, and share the food that has been prepared and the symbolic fruits of your symbolic hunt.
Thirdly, it's where you tend to talk, over the meal, about your lives, and what has been happening in them, without the distractions of TV, music, books, noding or whatever.
Finally, it's where some of your bitterest battles are acted out. (If you don't believe me you try getting a teenager to wash the dishes)
They don't call family dramas kitchen sink dramas or soap opera for nothing.