Is there a good translation for the word tierno?

I loved this picture from the very first time I saw it. It is so sweet, full of thoughtfulness and affection. The mother of the family is an angel so no wonder her children turned out they way they did :) 

I am really fond of drawing squares like when you first started to draw in school. One might say it is "cheating" not to draw on free hand, while others go the opposite direction and use a projector. Are there any other good ways of drawing? 

Anyways, my opinion is that it is the end result that matters the most. Drawing everything on free hand would take longer time and also, in my case, it would be less accurate compared to the original photo. 

Here I have started on the first layer of oil (the clothes of the older brother).

This is the last version of the painting. I would have continued on it for sure if it hadn't been sold.

In the end, this painting ended up in the home of a woman living in Zaragoza (if I remember it correctly). She had run errands in Madrid and passed by the studio and seen the painting in the display window. From there everything went very fast. I varnished and photographed the painting even though it wasn't finished.  I didn't even sign it, I just put my name on the back. I would have handled the whole situation a lot differently doing it all over again. No rushing (I would also have allowed another person the possibility to buy it first). 

With that being said, I hope the woman who bought it is pleased with it! Also I must say it is an honor and a very special feeling when someone you don't know like what you do and want your art in their own home. :)