I made a terrible mistake by falling inlove with another woman.

Dear Sis Dolly
I am a professional working guy who has messed up with his lover for 6 yrs. Although my lover was not working at that time, she was very supportive and we planned everything together including improving our own house. However, I made a terrible mistake by falling inlove with another woman and have fathered her a son. My life became a mystery cause she is not what my ex lover had to offer. My life changed from bad to worse in such a way that I started looking for my ex. Fortunately, I met my ex lover recently and we agreed to take things back to our good old days. I am prepared to lose the property and support my son for the sake of returning to my ex. I am also prepared to marry her for good, and will not rest until dis is done. Truly, we really love each other except the ordeal that happened. Can You advise me what should be done?