John Gill Commentary Genesis 45:15

"And he kissed all his brethren, and wept upon them: and after that his brethren talked with him." — Genesis 45:15 (ASV)

Moreover, he kissed all his brethren
In their turns, to testify his real affection for them, and hearty reconciliation to them:

and wept upon them ;
that is, upon their necks, as he had on Benjamin's:

and after that his brethren talked with him :
being emboldened by this carriage of his to them, and encouraged to believe that he really forgave them their sin against him, and was truly reconciled unto them, and had a real affection for them, and had no reason to fear he would avenge himself on them.

They entered into a free conversation, and talked of their father and their family, and the concerns of it, and of what passed since the time he was separated from them.