Rose, 34, documented her son opening a personalized gift from the “Shake It Off” singer on Instagram late Tuesday night.
“Look at that! Taylor Swift sent that to you,” Rose says in the video.
“Really?” Sebastian gushes as he opened the black and white “Reputation”-themed box. “This is gonna be so exciting!”
Rose informed Sebastian that Swift, 28, had sent them concert tickets, but in the moment, he was more interested in the tangible treats the singer provided.
“Oh my God,” he cries out. “She sent me a letter! Taylor sent me these!”
Swift has beefed with Yeezy and his wife ever since the reality queen posted Snapchat videos in which Swift appeared to approve West’s “Famous” lyrics, including the line, “I feel like me and Taylor might still have sex, why? I made that b—h famous.”