Dear Ivan,
Congratulations on becoming a  father. I'm so happy for you. You deserve this happiness and many more. I'm happy because I couldn't hold any grudge in my heart for Sam and you. You have been nothing but good to me and that is why Almighty has blessed you with two bundles of joy.
Ivan, I forgive Sam for her past. I don't hold any grudge against her. I don't mean to act all kind and great. To be honest, sometimes I used to think what's less in me or what's more appealing in Sam that attracts you to her? But now when I look back to the past couple of years, I only see good in it. As they say, everything happens for our own good.
If I wouldn't have left London, I would be in maybe poorer condition. If I hadn't forced you to marry Sam, you wouldn't have fallen for her and you wouldn't have had a family by now. Everything was good. Despite the fact that I did a lot of mistakes and I hurt so many people.
Ivan, it's my last letter to you. I won't be able to live for any more months. I've got a short amount of time left on my hands.
I ask for your forgiveness.  I don't want to take the burden of all my deeds with me.
Please forgive me, Ivan. Forgive me for causing you the hurt. For all the sleepless, restless nights that you spent.  For all the tears that you shed. And for all the times I broke your heart.
Forgive me, please.
I won't be able to meet your children but I sincerely hope that their futures be bright and cheerful with their parents. I hope they're good kids when they grow up.
With lots of good wishes.
Take lots of care.
                                                  Alex