No. Catholics believe that heaven is not a place per se but rather a state of being that does not correspond to the limited scientific laws that we find here on earth. The life we share with God goes beyond stages of sickness and makes us all one again with God — where sickness can never have power over us again.
The Church teaches that “In this new universe, the heavenly Jerusalem, God will have his dwelling among men. ‘He will wipe away every tear from their eyes, and death shall be no more, neither shall there be mourning nor crying nor pain any more, for the former things have passed away.'”
It sounds to me like perhaps there might be some fear that Mom may no longer remember who you are because of her illness. In heaven, God makes all things new. There is no need to worry about memory. Heaven goes beyond our human understanding, so the life we will share will be different that what we know — a greater resurrected life in Christ. We trust that God will offer us all that we need at that time and that all worry will be destroyed.
from Mike Hayes and the Busted Halo Question Box