Speaking to What's On TV, the actress said that Glenda (Glynis Barber), Peggy (Barbara Windsor) and Jack (Scott Maslen) will overhear her emotional outburst to sister Roxy.
She explained: "She tells Roxy (Rita Simons) what Archie did to her. She tells her that he raped her one night when she was 13.
"What she doesn't realise is Glenda and Peggy have brought Jack back to the flat. She turns around and sees them... and they've heard every word."
Womack added of a forthcoming scene: "Ronnie doesn't even get into the room properly when she hears Archie's voice [on a home video Glenda and Roxy are watching] and the bad memories come flooding back.
"She leaves so quickly they don't even realise she was there. Ronnie looks at herself in the mirror and her demons have returned.
"Glenda goes on about how Archie was an evil man and it's too much for Ronnie. Hearing his name makes her panic and she flees back to Jack's."