Real or not, Cruz's response to this and his allegations that it's Trump's fault have given this story legitimacy and now the media is jumping on it. Cruz might implode this Easter weekend (where families are all getting together to talk and reflect on their faith) when he should have not given this the time of day. This might have been a big mistake.
^^^^^ This. I didn't see anything about this on any major news sites until Cruz denied it.
Though most of the articles are about Cruz denying it, so this might not hurt him enough to cost him too many votes. However, it will probably be enough to either hand Trump the nomination outright or make Kasich the nominee in a brokered convention. Either way, Cruz's chances of the nomination are gone.