RTS or throw away? Update page, 3

My LO, who is turning 1 this week, just got a package in the mail addressed to him from SIL1. SIL1 has showed repeatedly over the last few months that she feels entitled to a relationship with LO and that she does not respect me. DH has been firm and established boundaries and told her that I come first, as such she has not seen LO since Christmas.


DH said that I can either toss the package or return to sender. What does DWIL recommend? She had tracking on it so she will know that we received it