Name the wrong
Treating a parent with contempt while using another good deed as an excuse.
Commandment 5 · Honour your parents

An aging parent needs help understanding an important appointment. You can assist, but irritation has become your default. At dinner you imitate their confusion for a laugh. Later you describe yourself as a dutiful child because you pay one bill. Your support is real. So is your contempt.
Honour thy father and thy mother: that thy days may be long upon the land which the LORD thy God giveth thee.Exodus 20:12 · King James Version
Choose the response you are prepared to defend. Then examine the cost.
Treating a parent with contempt while using another good deed as an excuse.
Preserving dignity and offering honest, appropriate care.
Honour does not require tolerating abuse or surrendering necessary safety boundaries. The case concerns help the adult child can reasonably provide.
Name one act of contempt you need to stop and one responsibility you can reliably meet. If care is shared, make the plan explicit rather than assumed.