Personally, I don't believe that 'Jesus Take The Wheel' has appropriate lyrics for a mother's day song. But if your mom really likes it, then I would say go for it! Another couple of suggestions are:
Mama - Spice Girls (corny, I know, but has good lyrics!)
My Wish - Rascal Flatts
Somebody's Hero - Jaime O'Neil
Kind and Generous - Natalie Merchant
"Kind & Generous"
You've been so kind and generous
I don't know how you keep on giving
For your kindness I'm in debt to you
For your selflessness, my admiration
And for everything you've done
You know I'm bound...
I'm bound to thank you for it
You've been so kind and generous
I don't know how you keep on giving
For your kindness I'm in debt to you
And I never could have come this far without you
So for everything you've done
You know I'm bound...
I'm bound to thank you for it
I want to thank you
For so many gifts
You gave with love and tenderness
I want to thank you
I want to thank you
For your generosity
The love and the honesty
That you gave me
I want to thank you
Show my gratitude
My love and my respect for you
I want to thank you
I want to...
Thank you
Thank you
Thank you
Thank you
Thank you
Thank you