Prayers continue. Been 6 mos of visiting my 88 yr old dad daily, now in a nursing home and spiraling downward, so I can relate a wee bit to the trial of tending to elderly parents...albeit, your Mom is to be honored for the level of her involvement which is 110% and your dad for his loving support.
That is what marriage and relationship is all about!
Praises for them both and prayers for all including Grandma to get back on her feet, according to His perfect will...