It's complicated according Wikipedia:
There was no official registration of births at the time that Aisha was born, so her date of birth, and therefore the date of marriage, cannot be stated with certainty.
[25] Her age is not mentioned in the Qur'an. All discussions and debate about her age at marriage rely on, firstly, the various
ahadith, which are regarded by most Muslims as records of the words and actions of Muhammad and as a source for religious law and moral guidance, second only to that of the Qur'an. Unlike the Qur'an, not all Muslims believe that all ahadith accounts are a divine revelation, and different collections of ahadith are given
varied levels of respect by different branches of the Islamic faith.
[26] Sunni, various branches of Shia (such as
Ismaili and
Twelver),
Ibadi and
Ahmadiyya Muslims all regard different sets of ahadith as "strong" or "weak" in the power of their evidence, depending on their perceived
provenance.
[27][28][29]
Aisha's age at the time of her marriage is frequently mentioned in Islamic literature.
[16] According to
John Esposito, Aisha was married to Muhammad in Mecca in 624 CE, after
Hegira to Medina and the
Battle of Badr.
[30] Several scholars interpret this to indicate that she reached puberty at this age,
[15][16][31][32] although her age at the time is the subject of dispute. Al-Tabari says she was nine at the time her marriage was consummated.
[33] Sahih al-Bukhari's hadith says "that the Prophet married her when she was six years old and he consummated his marriage when she was nine years old."
[34] Other sources differ on the age of marriage, but agree that the marriage was not consummated at the time of the marriage contract.
[35] All biographical information on Muhammad and his companions was first recorded over a century after his death,
[36] but the
ahadith[37] and
sīra (traditional Islamic biographies of Muhammad) provide records of early Islam through an
unbroken chain of transmission. Various
ahadith stating that Aisha was either nine or ten at the time of her consummation come from collections with
sahih status, meaning they are regarded as reputable by most Sunni Muslims.
[34][38] Other traditional sources also mention Aisha's age. The
sīra of
Ibn Ishaq edited by
Ibn Hisham states that she was nine or ten years old at the consummation.
[39] The historian
al-Tabari also states that she was nine.
[40] Marriage at a young age was not unheard of at the time, and Aisha's marriage to Muhammad may have had a political connotation, as her father
Abu Bakr was an influential man in the community.
[41] Abu Bakr, on his part, may have sought to further the bond of kinship between Muhammad and himself by joining their families together in marriage via Aisha.
Leila Ahmed notes that Aisha's betrothal and marriage to Muhammad are presented as ordinary in Islamic literature, and may indicate that it was not unusual for children to be married to their elders in that era.
[42]
Aisha's age at marriage has been a source of controversy and debate, and some historians, scholars, and writers have revisited the previously-accepted timeline of her life.
[43] Some writers have calculated Aisha's age based on details found in some biographies, eschewing the traditionally-accepted ahadith. One hadith recorded in the works of some medieval scholars, including
al-Dhahabi,
[44] states that Aisha's older sister Asma was ten years older than her. This has been combined with information about Asma's age at the time of her death and used to suggest that Aisha was over thirteen at the time of her marriage.
[45] Gibril Haddad criticizes this approach as relying on a single narrator, and notes that a hadith from the same narrator gives a broader range for the age difference between the sisters.
[46] Using reports on the birth year of
Fatimah as a reference point, the
Lahore Ahmadiyya Movement scholar
Muhammad Ali has estimated that Aisha was over ten years old at the time of marriage and over fifteen at the time of its consummation.
[47]
Aisha - Wikipedia
For me, the key is that whatever her age was the end of the second paragraph where it is said: Marriage at a young age was not unheard of at the time, and Aisha's marriage to Muhammad may have had a political connotation, as her father
Abu Bakr was an influential man in the community.
[41] Abu Bakr, on his part, may have sought to further the bond of kinship between Muhammad and himself by joining their families together in marriage via Aisha.
Leila Ahmed notes that Aisha's betrothal and marriage to Muhammad are presented as ordinary in Islamic literature, and may indicate that it was not unusual for children to be married to their elders in that era.
I would also add that in the rest of the article in Wikipedia they seemed to be happy together, so that would indicate to me that she didn't consider herself abused by the Prophet.