My father is an Alcoholic

My father 45 drinks all the time and if he wasn't well off due to inheritance, he would be living the gutter. My mother 42 only stays with him due to a prenuptial agreement, I'm his only child and the reason he and mother are married. I'm 22 and was the result of my parents having sex while attending university, she was drunk, and he took advantage. I was the result and to stop a scandal they married, but it's more likely my father didn't want to be disinherited by his parents. He graduated and has never worked a day since, hasn't slept with my mother for years. My mother caught me masturbating when I was almost 19. So, she took over stroking my cock and we started having sex regularly. My mother is very willing have sex with me and the only thing she dislikes me doing is drinking. I date girls and have gotten lucky sometimes. Whether or not I get lucky on my date I can always go to my mother and sleep with her. My father was lucky in a way his parents died in 2020 of Covid or he would've been written out of the will by them and being bypassed in favor of me. My mother had another child in 2021 a baby girl my sister/daughter as I'm the father. My father is rarely home and stays at his apartment in the city mostly and if he visits it's a very short visit. He has no idea of my sister/daughter, he has never asked who the parent of my daughter is. All he knows there's a young child at the rural property my mother prefers to live at. But assumes she belongs to some staff member; he has seen her several times always with her nanny and as he didn't know his wife was pregnant assumed she belongs to the nanny. I let him think that my mother doesn't talk to him at all, mainly because he blames her for getting pregnant and trapping him and calls her a frigid cow. He will never admit he had done anything wrong. He also hates being on an allowance and his access to his inheritance restricted by the clauses in parent's will. His health isn't great due to his drinking, his liver and kidneys are badly affected by excess drinking. He is very wrong about my mother being frigid, she is very passionate lover with me. My mother has decided to try again and has stopped taking any precautions. Whether gets pregnant or not again, won't be from the lack of us trying. I'm have the same names as my father and his father before him, so the father's name on the birth certificate is the same as on mine. No numerals added or I'll the 6th, but my mother still wants me to marry and I'm looking, no possible wife yet found.