Just as Eve's response to Cain's birth is recorded in Scripture (Genesis 4:1), so Eve's response to Seth's birth is also recorded in Scripture:
Adam had relations with his wife again; and she gave birth to a son, and named him Seth, for, she said, "God has appointed me another offspring in place of Abel, for Cain killed him." (Genesis 4:25)This is the last verse in Scripture which directly quotes the mother of all the living (Genesis 3:20). Eve's words show her recognition of God's sovereignty. There are many statements which Eve could have made— she could have boasted and proclaimed, "I have bore another offspring," but instead Eve said, "God has appointed me another offspring". If only every man was just as quick to recognize that every good thing given and every perfect gift is from above! (James 1:17)
After the fall, Eve's words are quoted twice, but Adam is not quoted at all. Simply put, the book of Genesis contains no clear evidence that Adam returned to God. Unlike Adam, Eve makes two short statements in Genesis 4 which seem to indicate that she returned to God— at Cain's birth she recognized that she was dependent upon God, and at Seth's birth she recognized God's sovereignty.
Abel (the righteous one) had been killed by Cain, so Eve saw Seth as a replacement for Abel. In the midst of a divided family, Eve bowed in submission to the sovereignty of her Creator. Little did Eve realize that her sin which brought havoc upon the universe would find its redemption through a descendant of Seth.
Righteous Men of the Pre-Flood World - Genesis 4:26
When Was Seth Born? - Genesis 4:25
Cain and Abel: Two Routes - Genesis 4:1-2
The Fall: No Repentance - The Christian Worldview
The Fall: Merciful Curses - The Christian Worldview