Past/Present/Future Tense, It's all good!

This week has been...helpful, I guess is the word. For those of you who don't know, I am in school still, and doing it completely from home (yes, the horror, I am a homeschooler!). I've been doing a lot of writing exersizes lately, along with reading a lot of classic literature. Yesterday, I focused on For Whom the Bell Tolls by Hemingway, and his use of tense change. He gradually changes from present to past, to even farther in the past, and back to present seemlessly. It's amazing. I tried his techniques and found that I was able, finally, to write a scene that's been in my head forever! It went a little like this...
'Regan? I'm so sorry...for your loss. I...she was a great woman. The world will miss her.' He glanced up at Sana, salty tracks through the dirt on his cheeks and swollen, red eyes proof of his grief.
She sat. After a few moments of silence,
'She raised me. After my mother died, it was like my father was no longer human. She lost her husband and her only child very early on, before I was born, and treated me like the son she never had. When the war started, she did not want me to go. I think she knew that she would not see me again. But I left her, and now she is dead."
He looked at her, and his pain was so evident in his deep brown eyes, it moved her to tears.
'This isn't your fault Regan, if she knew, she was at peace or she wouldn't have let you go. You cannot blame yourself!'
She had learned to forgive herself. It was really Akiva's forgivness, but she was at peace. That fatefull experience never did quite leave her. They had been young, still practically children. He had wanted to hunt like his father, even if he had only stones and a thong of leather as weapons. She had followed, enjoying his make believe game. When they actually found a wild boar, both were too frightened to scream. Large and muscled, with enormous tusks, it barreled staraight for them. Hasana had turned and fled, but she was quicker than Akiva. He fell in his hast, and the boar caught up to him. Sana did not stop until she heard the screams.
She was unarmed, small, and scared. She backed away quickly, tripping on stones and logs as she neared the forests edge. When she reached the trees, the boar looked up from mauling the boy, squeeled and took off over a hill. She never did know why, she was too terrified to question it then.
When she found her courage, she went to Akiva, and took him home, crying the whole way.
'I once left a one I loved."
Regan looked at her in curiosity, glad for the distraction.
'Chakra's brother. We...we were playing one day when we were young. A wild boar found us and, well I ran, but it caught up to him. I didn't go back, even when I heard the screams. He...he never walked again.'

Hope you like it! Any suggestions or comments are appreciated! God Bless!
~Living2dream