I ll share part of a narration; and we find in musnad ahmad

Amr bin ghalib says that once he visited Ayesha alongwith ammar and malik ashtar. Ammar said: o mother! Ayesha replied: I am not your mother. Ammar said: you are my mother even if you donot like it

[musnad ahmad, urdu, vol 11, page 459-460]

Sheikh shoaib says hadeeth is sahih [42/463 /25700]

so, ayesha is umm-ul-momineen but not mother of sahabi? what does this mean? he was not a momin? or ayesha was lying? or what?