i have been seeing a wealthy married man for 30 years. now he is terminally ill. what r his financial obligati

he has paid my taxes for the last 10 years. but i have financially supported myself throuout the relationship. i have been single for 35 years. Is he obligated financially in any way to help me.? I cannot make it on my social security plus working part-time. my health is also at risk as i am aging. i have spent over half my life with this man. what do i do. ? His wife does not know, and I have never asked him to leave his wife.