The couple have been spending a lot of time together recently -- in fact, they were photographed once again holding hands, this time outside of the Crosby Hotel in New York City on Thursday night.
Niall Horan, Zayn Malik, Liam Payne and Louis Tomlinson are concerned that the 22-year-old We Are Never Ever Getting Back Together singer will write a song about Harry, 18, and humiliate him if things turn sour in their romance.
Not only would this cause huge embarrassment for them all – they’re also worried it could harm their fanbase.
“With Taylor’s reputation for writing break-up songs about her exes, they think Harry could find himself in a spot of bother if it doesn’t work out and his actions are setting them all up for a fall."
The source revealed, “They also think it is moving too quickly and both have busy schedules, so it’s a difficult time for either one of them to commit.
“Harry’s especially loved by the band's female fans and there is a feeling that by being so open about his relationship with Taylor he will only upset them.
“The boys are praying that when it does come down to it, he ends things amicably with her. Otherwise, they fear there will be hell to pay."
Leona, 27, ended her two-year relationship with German dancer Dennis back in October and soon after began dating Liam. But now, both couples have walked back into their ex’s lives – Liam, 19, was seen walking hand-in-hand with his former love Danielle Peazer in New York last Sunday, while Leona was spotted at London eaterie Bluebird with Dennis last Thursday.
“Leona and Liam have been friends for nearly two years, so when they were both single they took their relationship to the next level,” a source told RadarOnline.com.
“But Leona had an ulterior motive – she wanted Dennis to see what he was missing out on and wanted to make him jealous."