All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
We congratulate you on repenting to Allah, the Almighty, from this grave sin. We hope that Allah protects you in the future and strengthens your commitment to repentance. It is incumbent upon you to block any path that may lead you to commit this sin again, such as forbidden gazes and private interactions with non-Muhram women, and the like.
There is a difference of opinion among scholars regarding the ruling on abortion before the ensoulment of the fetus. Some permit it, while others are of the view that it is not permissible at various stages of fetal development, even if it is in the form of a sperm. The latter is the opinion we adopt.
Regarding the woman in question, there is no legitimate relationship established between you and her, so she has no legal rights over you as long as she willingly participated in the sinful act you both engaged in. Therefore, you are not obligated to provide her with any financial support or housing. The child resulting from this illegitimate relationship is not attributed to you. The legal aspects of paternity, such as financial support, inheritance, and the like are not established on him because he is not your son. The child is attributed to the mother, and it is her responsibility to provide for him, and she is the one who inherits from him and he from her. She is also responsible for his upbringing.
Allah knows best.