Living with Wife's Past Relationship & Facing Mother's Terminal Illness: Seeking Advice

Hi there, i am going through a difficult phase in my life, i dont know where to start but here my story goes. i work in UAE and i had a balanced and peaceful life until last November where i got married (arranged). we first met last year in march through marriage broker and everything matched, family also liked and we got married in November 2023. Before marriage we used to speak for 10-15 mins almost everyday (all casual talks and i thought everything was ok and she was the perfect match for me and my family). so after marriage i travelled back to uae and was supposed to bring her to UAE in Jan 2024. I had one past relationship for 2 years and we had broken up last year February as she was a from north of india and i was from south India and our families were against it and she wanted to go against family and get married but i was not ready as for me family became priority and we broke up. And after this relationship ended then only this match happened and after one month of my marriage my ex reached out to my wife and shared our relationship details and my wife got very upset and went back to her home. I travelled back to india to console her and tell her that it was my past and i am no longer in relation with my ex and our family involved and sorted this issue. My wife came back to us and everything was normal after that. My wife came to UAE in January 2024 and we started our married life here. All seemed good until i noticed a pattern of her taking to a person on phone everyday when i am out for office and also being very cautious with her phone. On confronting this she told its is her friend and i told her what is the point in talking to him daily for which she cried and told that i am controlling and she dont have freedom to talk to her friends. I left it as she was at home alone and bored and she was also looking for job here and may be with time she will change but still the talking continued until one day in May i was uploading her resume for her job and had access to her google photos and was shocked to see her photos with the guy whom she calls friend. There were photos of her with him after our marriage and also photos with him the day before she came to UAE. I confronted this with her and she cried and told that previously she had relation with him and parents did not agree and later she married me and had forgotten him but since she came to know about my past relationship she continued to stay in contact with him. She is not telling the complete story as i saw their photos before our marriage and even before our match happened and I have also seen her google location timelines as well. I told her to stop this if we want to continue our marriage she told ok but she still talks & chats to him through watsapp & botim because she is very secretive of her phone. She takes good care of me and tells she loves me but I am not sure she really loves me or just faking it. Now she is 3 months pregnant. I am thinking she will leave me for her ex giving me the baby after the baby is born as she mentioned this during one of our arguments. This is one side of my story and between all this my mom fell sick and upon consulting, she was diagnosed with cervical cancer stage 3A and I tried to get her the best treatment (chemo) but the cancer has spread widely and because of her age also she cannot take the treatment. Tried ayurvedic and herbal medicines but nothing can be done and doctors have told max she will live is 6 months. She is bedridden now and in pain everyday. I have a decent job in Dubai with decent salary where I have built my own house in my native and managing my home (parents in india & wife is UAE) but currently my finances is also effected very badly as I spent lot of money for our marriage and for my mothers treatment and I have loans and multiple credit cards as well. I am very stressed and all these things are eating me up daily and i don't know what to do and what went wrong and where? Even i cannot focus on my job as well. Please advise how can i go about these situation. i cannot share these to anyone also, Please advise.