Victoria Gifford Kennedy claimed the 22-year-old Grammy award winner, who is dating Conor Kennedy, crashed her daughter Kyle's wedding in Boston on Saturday, the People magazine reported.
Victoria says Conor was invited to her daughter's nuptials to Liam Kerr, but failed to RSVP.
"(Swift and Conor) texted me an hour before the wedding and asked if they could come. I responded with a very clear 'Please do not come.' They came anyway," she told Boston Herald.
"I personally went up to Ms Swift, whose entrance distracted the entire event, politely introduced myself to her and asked her as nicely as I could to leave. It was like talking to a ghost. She seemed to look right past me."
Swift's representative, Paula Erickson, however, called Victoria's claims bogus.
"Taylor was invited to the wedding and the bride thanked her profusely for being there," she said.
Prior to this incident, the Kennedy family has treated Swift warmly and welcomed her into the fold.
"She's awesome. She's a great friend of all of ours," ," Conor's aunt, Rory Kennedy had said of the singer.
