The 23-year-old has been in a relationship with the former Coronation Street star, who appeared in the latest series of reality show I'm A Celebrity... Get Me Out Of Here, for three years, and Flanagan has been quick to dismiss rumours of a split.
"It's a load of rubbish," Flanagan told New! magazine: "'Helen's very clingy!' We had so much banter about it.
"I've been with Scott for three years and we're obsessed with each other. No relationship's perfect, but we really love each other and we're really strong. Me and Scott both really want a baby."
Since Sinclair moved to City last summer, the former Swansea City star has been unable to maintain a place in manager Roberto Mancini's first team.