In English, to "help someone do something" means you do it with them. When it is not to be done with the person, do not use "help", use' for".
Mary talked to her husband, she said "Could you please help me to make the dinner". (They will make the dinner together)
Do you agree with the above? Yes.
If we say "Could you help me? ", does it mean that we ask someone to do it with me? Depends on context i.e. what precedes or follows as in "Could you help me? I need you to deliver this to WinWin." (not together) OR "Could you help me?" I need to deliver this to WinWin and it's too heavy to carry by myself." (together)