We are truly sorry to hear about the struggles you and your child are facing, Rasulue. Firstly, we want to assure you that God is not punishing you. The enemy comes to steal, kill, and destroy, but Jesus has come to give us life and life more abundantly John 10 10). It is not God's will for you or your child to suffer in this way.
We must address a delicate issue in your request. You mentioned your child's "self-gratification disorder." We understand this is a difficult topic, but it's important to approach it biblically. Masturbation is a form of sexual immorality and is not God's design for our bodies. It is important to teach your child the principles of purity and self-control from a young age. Be sure you are not incorrectly assigning adult motivations to a toddler. It is quite common for a toddler to touch their private parts and this is not an issue. Even if this is not that issue, please note that If she is doing this for physical pleasure but is not old enough to know that it is wrong by age, she is not guilty of sinning but should be corrected by teaching her this is wrong Romans 14 23). Be sure she understands that this is wrong and should not be done. Romans 7 14-25 refers to how we all have sin and the only way to overcome is with Christ.
Regarding your marriage, we are sorry to hear about the challenges you faced, including the infidelity and the subsequent loss of your husband. God's design for marriage is a lifelong commitment between a man and a woman. Adultery is a sin against God and the marriage covenant. Pray for your late husband and understanding of what may have happened in his life to explain his adultery, for your marriage and for your child Exodus 20 14).
We also noticed that your prayer request does not mention the name of Jesus Christ. It is only through His name that we have access to God's throne of grace. There is no other name by which we can be saved (Acts 4 12). If you have not already, consider inviting Jesus Christ into your life as your Lord and Savior John 3 16-17).
Let's pray together:
Dear Heavenly Father,
We come before You in the name of Jesus Christ, lifting up Rasulue and her child before Your throne of grace. Lord, we know that this situation is not your will and we rebuke the enemy's attempts to steal, kill, and destroy their lives any longer. We know that there is reality and awareness of sin now and pray for a spiritual hedge of protection over them. We especially pray for Rasulue's child, that she may look to Christ for a hope and a future, and more importantly understand a Godly life as your child, as we are all your children. Father we pray that you would teach and help Rasulue an effective and appropriate way of correcting her without making here ashamed or herself feeling guilty.
We also pray for Rasulue, that You would heal her heart from the pain of her past, the loss of her husband, forgiveness for any sins committed by Rasulue or her husband, and the struggles she is facing with her child. Surround her with Your love, peace, and comfort, and guide her as she navigates this season of her life.
We ask all this in the powerful name of our Jesus Christ. Amen.
Articles:
"Trust God's forgiveness! 'If we confess our sins, he is faithful and just and will forgive us our sins.' (1 John 1:9) He's here to help. 'Cast your burden on the Lord, and he will sustain you.' (Ps 55:22) Praying for your freedom & strength! 
"
Gilioraorance:
**Prayer Group Updates!** 
Let's lift up @Anonymous who's feeling burdened and needs wisdom for a tough conversation. Also, let's pray they find their lost keys!
@Reborn12345 is believing for financial provision and guidance ahead of their move to Australia.
@Irtoruyron is experiencing stroke symptoms and needs our urgent prayers for healing.
