Dear Mark, I'm very sorry for such a great loss; No one can take mother's place but that space can make us empty or great based on the course of action we take. I firmly believe our good deeds and helping family, friends, friends of our parents, and the humanity in large really help increase the blessings for our parents while making our lives more complete and purposeful. You have great gifts from your parents and you spread them well, just keep spreading their love and wisdom it will keep you strong while increasing the blessings for your parents' soles. I also believe offspring are a constant charity of their ancestors, all good deeds we do give benefit to our parents and grand parents. May God bless her sole and give you patience to be strong Warm Regards Rashid Shaikh and family