Jason Donovan makes crude joke about his sex life with former lover Kylie Minogue

Jason Donovan may have left former lover Kylie Minogue spinning around after he made a crude joke at her expense during a recent gig in London.

The pair met and fell in love in the '80s on the set of Neighbours when they played the Aussie soap’s resident sweethearts, Scott and Charlene Robinson -- and it was this relationship that Donovan seemed to mock during his Amazing Midlife Crisis UK Tour.

"As well as singing some of his most famous songs, Jason also shares with the audience stories about his career," a source told The Sun of Donovan’s gig. "When asked whether there was a lot of Jason in the character of Scott Robinson, he cheekily replied that there was certainly a lot of Scott in Charlene."

Although the exes recently reunited on stage when Minogue invited him to join her at the Radio 2 Live in Hyde Park on September 9 -- they sang their 1989 duet 'Especially For You' -- Donovan told the audience that it was a struggle to get Minogue to make a cameo at his own concerts.

"He told a tale about how he tried to get Kylie to join him on stage at London’s Hammersmith Apollo and attempted to contact her," said the source. "His emails bounced back, his WhatsApp messages were ignored and he couldn’t reach her on Instagram.

"Then he was in the audience at Hyde Park last month and Kylie's manager asked him on stage at the last minute, so it wasn't pre-planned."

After that performance, Donovan apparently told friends that he hardly sang during their recent onstage reunion because Minogue hogged the microphone.

"He said that's why he didn’t sing during the track and talked about Kylie hogging the mic," said the source. "The stories have started filtering back to Kylie through her friends -- and her close circle don't think she will be best pleased."

While Minogue has yet to comment about Donovan’s recent remarks, on Friday she played a gig at London's 02 Arena and sang their duet 'Especially For You' on her own.

"It's always disappointing to hear someone is making jokes at your expense," said the source. "As far as Kylie is concerned, Jason is a great guy and she respects him -- she's just a busy lady."