His mother was not there. The two Mary's were Mary Magdalene and Mary, the sister of Lazarus.
Matthew 28:1, 5-8 (KJV)
In the end of the sabbath, as it began to dawn toward the first day of the week, came Mary Magdalene and the other Mary to see the sepulchre.
And the angel answered and said unto the women, Fear not ye: for I know that ye seek Jesus, which was crucified.
He is not here: for he is risen, as he said. Come, see the place where the Lord lay.
And go quickly, and tell his disciples that he is risen from the dead; and, behold, he goeth before you into Galilee; there shall ye see him: lo, I have told you.
And they departed quickly from the sepulchre with fear and great joy; and did run to bring his disciples word.
Mark 16:1-10
And when the sabbath was past, Mary Magdalene, and Mary the mother of James, and Salome, had bought sweet spices, that they might come and anoint him.
And very early in the morning the first day of the week, they came unto the sepulchre at the rising of the sun.
And they said among themselves, Who shall roll us away the stone from the door of the sepulchre?
And when they looked, they saw that the stone was rolled away: for it was very great.
And entering into the sepulchre, they saw a young man sitting on the right side, clothed in a long white garment; and they were affrighted.
And he saith unto them, Be not affrighted: Ye seek Jesus of Nazareth, which was crucified: he is risen; he is not here: behold the place where they laid him.
But go your way, tell his disciples and Peter that he goeth before you into Galilee: there shall ye see him, as he said unto you.
And they went out quickly, and fled from the sepulchre; for they trembled and were amazed: neither said they any thing to any man; for they were afraid.
Now when Jesus was risen early the first day of the week, he appeared first to Mary Magdalene, out of whom he had cast seven devils.
And she went and told them that had been with him, as they mourned and wept.
Luke 24:10
It was Mary Magdalene and Joanna, and Mary the mother of James, and other women that were with them, which told these things unto the apostles.
There, that should be good enough, and I didn’t even quote John.