Wife is refusing sex for long

It is for nearly 8 years I am denied of to enjoy sex with wife.We have only child (a girl who is now 16 years). Wife is interested to sleep along with the daughter only since 8 years during nights and keep me away from her. She came with a new definition saying when our daughter is around, how can we sleep separately in our bedroom.!!!! She insisted that she cannot afford to leave our daughter alone separately in a room to sleep in the nights. Instead she pointed out to me to sleep separately as she is interested only in daughter than having sex during the nights or enjoy deriving sexual pleasures. She further advises that if i cannot sleep alone or don"t get sleep, I may be free to take a decision.!!! Note : She is an educated woman and independently employed in the 40's. She feels secured only when the daughter is with her and she cares shares only with daughter and I have been kept at a distance by both of them. They have understandings which tease me everyday..and night. Please assess who is trying to kill my sex life ( wife or daughter) Because of lack of sex, I have been suffering all these 8 years and getting depressed and unable to concentrate my work and deeply frustrated. Is it due to a cause of stress arising out of:- 1) is it due to 3 times earlier abortions? 2) is it due to mother"s & brother"s death 3) due to financial stress 4) due to loan & work pressure 5) due to over expectation in life( comfort & luxury) 6) due to lack of sleep comfort 7) due to lack of interest in sex 8) due to any gynaecology problems 9) due to any other psychiatric problems 10) or any other unknown reasons Need help and guidance and how to proceed further. thanks..

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