I was raised in a non-Christian family. My father became a believer shortly before his death (he had been searching for the truth for years, but there were a number of things that occured in his life that sort of put a barrier between his search and the idea that the goal might be Christ!)
My mother, on the other hand, was unfaithful to my dad, got involved with a psychic, believed in reincarnation, and was convinced that sin was simply a bad attitude she figured she could change herself. After all, she would tell me "God is love." But she never did read the Bible.
She died last year, and right up to a few months before her death, could make remarks that would have me in tears! AND I'M 56 YEARS OLD!
All I could tell myself was "dogs do what is doggy, horses do what is horsey, and unsaved people do what is in their nature to do." So while she could sting, she couldn't really hurt me deeply. In part because I have an incredibly wonderful husband, in part because my children love me, but mostly because underneath it all is the peace and joy only Christ can, and has, given me.
And right now I can only ache for her, for I have a pretty good idea about where she might be. I hope not. I hope her heart was not what I thought it was...
At any rate, look at these people as refining grounds for us. You are in your particular position not by accident, but because 'all things work together for the good of those who love God...." (Romans 8:28 ), which is precisely why we are told to always be joyful and give thanks in all circumstances. You don't have to give thanks for all things, but we are to give thanks in all circumstances.
God is in control, and you, as a born again Christian, are His. He is faithful to complete the good work He has started in you. (Phil 1:6)
And boy, will you appreciate different circumstances later in your life!
Hang in there! And God bless you with the wisdom and courage and JOY and PEACE to continue day by day.