We are deeply moved by your request and stand with you in prayer for Erin.
Firstly, in all things we should pray in Jesus' Name. As Jesus said: "whatever you may ask in my name, that I will do " John 14. Also John 14 says, "Most certainly I tell you, whatever you may ask of the Father in my name, he will give it to you. Ask, and you will receive, that your joy may be made full. If you ask anything in My name, I will do. If you love Me keep My commandments. 24 He who doesn't love me doesn't keep my words. The word which you hear isn't mine, but the Father's who sent me. I have said these things to you, while still living with you. But the Counselor, the Holy Spirit, whom the Father will send in my name, he will teach you all things, and will remind you of all things which I said to you."
It's important to remain in faith and not be overcome by fear or despair. As believers, trusting in God, Erin and others believe that what Jesus said allows us to trust him and his provision. First make sure that trusting in Jesus' sacrifice is the means for Erin's salvation. She is married and has a new life. As Paul in Corinthians says submit to one another. If the head of a marriage submits to Jesus, the whole marriage benefits. Paul also said, "Do not be anxious about anything, but in every situation, by prayer and petition, with thanksgiving, present your requests to God." Also, Jesus said in Matthew, "Therefore, do not worry about tomorrow, for tomorrow will worry about its own things. Today's trouble is enough for today.".
Please pray together:
Father, we come before You in the name of Jesus Christ, lifting up Erin. We are not stating a diagnosis and not accepting what doctors are saying. That this may not be a terminal condition and are praying against a deadly diagnosis. Lord, we know that You are the Great Physician, the same that so faithfully healed Erin when she had stage four cancer in the past, and believe that You can heal her so she can continue to live the life You have planned for her. We rebuke any spirit of fear and doubt, and choose to trust in Your goodness and mercy as Erin walks through this difficult time.
You said if we have faith we could walk on water. This is why we believe Erin challenge can serve to grow her faith and the faith of others in Jesus name. As Paul says, "For our light affliction, which is but for a moment, works for us a far more exceeding and eternal weight of glory; While we look not at the things which are seen, but at the things which are not seen: for the things which are seen are temporal; but the things which are not seen are eternal.
Father, please surround Erin and her family with Your comfort and Your healing power. May Your will be done in this situation. We rebuke any spirit of fear and doubt and put our trust in Your goodness alone. We believe in Jesus' name those that believe in him can say mountains be removed and "it will be done for you." Jesus also said, "For most certainly I tell you, if you have faith as a grain of mustard seed, you will tell this mountain, 'Move from here to there,' and it will move; and nothing will be impossible for you. But this kind doesn't go out except by prayer and fasting."
You have already been touched many of her loved ones to lift her up in prayer as well.
Father, strengthen her and her family through this troubling time. We thank You for Your Psalm 34:4 says. "I sought Yahweh, and he answered me, and delivered me from all my fears. " Lord, we believe that You can turn this situation around for Erin's good and Your glory. We thank you, in Jesus Christ's name. Amen
Let's lift up 
Let's lift up @AlexanderYondel's request for protection over his family. May the Lord watch over their sleep tonight.
And a general shoutout for everyone dealing with health issues or needing peace. We're with you! 
Hello everyone, let's gather in prayer! 
