Jackie, who manned the KIIS FM desks today with regular fill-in host Beau Ryan and James Weir, in lieu of Kyle's absence also revealed that she has no idea why Kyle didn't turn up for work.
"I don't even know why he wasn't in today," she pushed.
However, Henderson refused to dish any other details on her long-term work partner's split, saying that Kyle would like to deal with the event privately, despite announcing it on air the previously day.
"A lot of people have been hitting us up on social media, a few phone calls, some media enquiries about my relationship status," Kyle told his listeners earlier this week.
"We haven't been living with each other for quite a few months now. Unfortunately it's just run its course."
An hour following the announcement Kyle was ambushed by reporters outside his luxurious $7.7 million home in Hunter's Hill, where he refused to comment on the situation further.
Imogen, who spent seven years with the radio host, has yet to comment on the split. Instead, she has been spotted partying in LA with friends including American rapper Brooke Candy.
She uploaded a photo of herself for Halloween dressed as Marge Simpson at a party in Beverly Hills, where a fan asked where Kyle was.
"Kyle was doing Homer [Simpson] but had to stay in Australia," she wrote in a comment.
The pair began dating in 2011, after initially meeting at Kyle's 40th birthday party.