You are probably still in shock dear lady...that wonderful cocoon that wraps around us, protecting us from the reality of never seeing that person again. And you, as a caregiver have yet another reason to postpone your grieving.
Watching your father struggle for each breath is a painful memory...one that will take time to replace. Does your mother cry often...ever? Does she read?
My heart goes out to you both....I'm glad you are attending the support group. What is the moderator like? Do you talk? Talking about our feelings helps in the healing process. Do you ask your mother to talk about your father....how they met, etc. We all yearn to talk about our loved ones who have passed on. You can cry together....it helps.