I tried but I haven't found anything about the family of Col. Chester Phillips, so this came out of my imagination only :)

Enjoy it

Colonel Chester Phillips got married during the Great War. His wife, Queenie, was one of the first spies who showed him that women are needed behind enemy lines as well as at home. She was the one who led him to feminism and in the end, she was the reason why he decided to take Peggy Carter under his wings. They got married and planned a big family, when she was shot in her abdomen and that injury prevented them from having children on their own. It, however, did not mean that they were childless.

My dearest Queenie,

I have been receiving your letters and I have been enjoying every line you wrote to me about our nieces and nephews and about your whereabouts with them. I know that you take them as your own children and as we were not able to conceive our own, I know that you consider them to be nothing less. I want you to know that every time I read about you, my heart is beating hard for you and for them and that I consider them nothing less than you do. I take them as our children too and I can't wait to meet them again.

You have been asking me if I have someone like them in here and I must admit that even though I raised hundreds of soldiers myself, there are two people who I take as my favourites. Even though I am not allowed to have favourites and I shout at them as much as at others, I think about these two as my personal victory

The first one is Steve Rogers. You might have heard about him by now, but before he became what he became, he was a thin, clumsy kid. I did not understand what he was doing in the army, and it took me a while to appreciate him, but now I see that what made me angry with him was the fact that he reminded me of myself. He is a super-soldier now, he is famous, and he is the strongest man we have in the army, but he is still very polite, and he knows how to behave. Except when he is around women because then he is as clumsy as I was with you the first time we met.

The second person is Agent Margaret Carter. She is a spy, and she proves what you have been showing me from the very first time we met in the Great War – that women are as capable as any men. She is an excellent spy, and she is as stubborn as you are, that sometimes I struggle not to call her by your name. In fact, I think that I might have called her by your name once, but nobody realized that. I think that if we had had a daughter, she would have been like her. I almost threatened the Howling commandos that if anything happens to her, they will answer to me.

Queenie, they are both so stubborn that sometimes I do not know what to do with them. I feel lost. I would love to help them and protect them both even though I know that I can't. It is the most unpleasant commitment to send them behind the enemy line and wait for them to return, not knowing what is going on. I know that I can rely on them and that when they are together, they will take care of one another, but sometimes I just feel something more for them than just the responsibility over my soldiers.

I would like to share one precious moment from the last week. I do not know how they found out, but they found out the date of my birthday and they threw me a party. Everyone from the camp was celebrating and they gave me a chocolate cake that I loved. That is to answer your question about my birthday. Yes, my darling, this year I enjoyed that day almost as much as when we were in that small hospital during the Great war when I was shot, and you found me and decided not to obey your commands and stayed with me. I can still remember the annoyance of our superior.

I miss you profoundly, but I want you to know that I am not alone.

Please kiss all our kids at home from me and tell them that I am looking forward to seeing them soon!

Love,

Yours, Chester

My Darling,

I am immensely glad that you enjoyed your birthday since I know it is a day of the year you do not like at all! I must admit that Peggy and Steve sent me a letter and I answered them with the correct date of your birthday (not the one you are always saying in order to avoid any celebration) – so that is how they found out.

I know that it is hard to look after them since they are both army officers. I think that even though God had not blessed us with our own children, we are where we should be so we can take care of those who do not have their own parents to look after them.

Take care of our children.

Be careful my Love,

Queenie

So, what do you think? :)