And what about all the traipsing around your mum did for your brother when he was growing up?
Even baby boomers need reminding that looking after parents is part of the deal in life.(There are exceptions, all elderly parents were not nice parents growing up.)
My bro in law is selfless to a tee and is always there for his 95 year old mum. VERY HARD for him as he is an only child, but would not dream of not helping. She lives an hour plus away and in her own home. She always tells him not to bother, the carers will sort it when they come, but he keeps remembering all the care she gave him growing up. And he wants to be sure her needs are being sorted.
OTOH, they have a friend who, when her dad died, she shoved her mum in a home. Bottom line, she was a daddy's girl. Her mum was a lovely person, just not as doting as the dad. I found myself shying away from this woman when we'd meet, she just gave me the creeps. Once mum was in the home, she sold her house as she had POA and did not use any to contribute to mum's care. Her mum had a good pension but it was tight and she'd have to ask her daughter for some spending money. Little did she know her daughter was sitting on a nest egg that she then used to buy a house in a place in the sun.
So... if you love your mum, go that extra 1.5 hours, she will treasure your care in her heart to her dying day.
End of rant today! Sending many hugs and lots of encouragement.