Short answer
Caregiver resentment toward siblings is common when one person becomes the default planner, driver, bill-tracker, appointment holder, and emotional buffer while others stay peripheral or critical.
The resentment is not always about one task. It is often about the loneliness of being left inside the role.
The sibling who helps least may comment most
Some siblings disappear. Some mean well but stay vague. Some offer opinions without taking on labor.
They may say, "You should get more help," while you are the one researching the help. They may question a decision without having been present for the crisis that made the decision necessary.
That combination can make even reasonable suggestions feel insulting.
Why eldercare reopens old roles
Families rarely become brand new under pressure.
The child who managed feelings may become the care coordinator. The sibling who avoided conflict may keep avoiding. The one who needed to be right may become an expert from a distance. The one who felt overlooked may now feel invisible again.
Eldercare adds practical urgency to emotional patterns that were already there.
What resentment may be asking for
Clearer division of labor.
Less advice and more ownership.
A record of what is actually being done.
Permission to stop over-explaining yourself.
A grief process for the family support you wish you had.
A more useful request
"Can you help more?" is often too vague.
Try naming the exact task and deadline: "I need you to call the pharmacy every Friday," or "I need you to take over the Tuesday appointment for the next six weeks." Specificity gives the conversation less room to float away.
When therapy can help
Therapy can help you separate the current care problem from the older family injury underneath it.
Sometimes the goal is a practical sibling conversation. Sometimes the goal is accepting what your siblings cannot or will not give, so your whole life is no longer organized around trying to make them understand.
