What do you say

What do you say in those situations with your kids when they ask the most difficult questions. "Mom,where do babies come from? Why do people get married? Why do people fart?" Some make you laugh, some make you cry, and some just stop you in your tracks and think....

My son is 7 years old, he is funny, smart as whip, and cute as a button. He changed my life when he was born. He is very inquisitive and always asking questions that could have many answers. Most of the time I can still answer these questions in the most simple way possible. Last night however he got me. I had no answer. I am the mom and am supposed to know ALL the answers and last night....well I could barely even respond.
He asked me last night if I was going to have to do chemo again. I told him, "I don't think so". He doesn't need to know that I worry about this same question all the time still, so I answer and look down at this huge 7 year old kid barely fitting on my lap. He wipes his eyes. "Are you crying?" I ask him a bit confused. The whole time I went through treatments he never really said anything much about it. I tried to get him to talk about it but he never really did so I guess in my mind I believed he was unaffected by this as my 3 year old was and will be. I was wrong.
He looks up with those little blue eyes filled with tears and says,"Cancer can kill people". I shake my head, attempting to not burst into tears too, and say, "you are right love it does sometimes". He lays on my chest and tells me that he doesn't want me to die because he would miss me and not see me again till he dies. Tears are flowing now and I am trying to have some great things to say to ease his poor little mind. I remind him how I won my fight and my cancer is all gone. Then he asks the hard one, is it gonna come back?.....What do say to this? Do lie and say no way or never? Do you tell the truth and say maybe? Do you hug your little one tight and tell him you love him and you are doing everything possible to make sure that you never see this again?
My fear from day one was not treatment but that my kids would be affected by this disease too. Take what you want from me but leave my kids alone. Cancer effects an ENTIRE family not just the one receiving the treatments. Yes, treatment is the harder part BUT I would rather go through treatments than watch it any day! Seeing my 7 year old son so upset about this makes me hate this disease even more than I already do! I really didn't think that was possible. My fuel that occasionally runs out for helping those with cancer and their families was just refilled for like a year and I am on a mission to destroy this worry.
I hugged my son last night I told him that I loved him and will forever love him. I told him that even though my cancer is gone I will fight EVERY day to keep it away for him and his sister. I don't know if what I said helped ease his fears but it was 100% truth. I don't know what my future has in store for me so there is really no point in worrying about it. I have said it a million times in this blog and live it each day, "keep moving forward".....that is all we can do.
What do you say when you don't know the answers? I guess maybe sometimes the answer is just not having one.