Collins also said she expected more complaints given the MP's pattern of behaviour.
Another young woman has come forward with a complaint about disgraced National MP Andrew Falloon.
National leader Judith Collins confirmed today that another woman - a fifth case - contacted her last night. Collins said she had advised the woman to contact police.
She said it was now clear there was a pattern involving Falloon, who quit as a National MP this week after a pornographic image was sent to a young woman.
Collins said other victims could take comfort in the fact that more woman were coming forward.
"I hope that any victim feels able to come forward," Collins told reporters while visiting Wairarapa this morning.
Falloon was now an ex MP and not National's responsibility, but she was willing to hear from anyone who had a complaint.
Collins has condemned Falloon's actions, calling him "a liar" and saying it had become apparent his actions were a "pattern of behaviour" with three more women coming forward to say they'd also received explicit images.
Falloon resigned after a young woman's parents wrote to the Prime Minister's officer last week about a pornographic image the MP had sent.
That information was then passed on to National leader Judith Collins, who met with Falloon on Monday.
The now-former Rangitata MP's versions of events is that he was at a party several weeks ago and briefly left his phone unattended at a party — and acquaintances then used it to send the sexual image in question.
Collins, just as Falloon quit politics, said she believed this to be a lie.
"This has gone from clearly what was stated as a mistake, to now being something quite different," she said on Tuesday.