take or bring

Is B going to attend the party?

I think B should use "take"
For A, he uses "bring", "bring":to take something or somebody to the place where you are now. So , A←B
For B, “take”:if a person take somebody somewhere , he transport or lead someone there. So, B→A
That's my point of view.

Yes, B is going to the party too.

To bring is to move something or someone towards a destination. To take is to move something or someone away from a starting point. A will say to someone else, or to himself: "I will take my sister to B's party", but he will say to B: "I will bring my sister to your party".


Note: since B's sister is female, we use 'her' when speaking or writing about her.

Thanks, contrex.

It's a typo. Should be "her".