In what circumstances can a reasonable person reasonably conclude that she was in custody?

In the case before us, there was no evidence from which appellant, as a reasonable person, could have concluded that she was in custody. (People v. Blouin, supra, 80 Cal.App.3d 269, 282-283, 145 Cal.Rptr. 701.) The questioning was of short duration and was conducted in front of appellant's home with no evidence of any coercive environment. (Id., at p. 283, 145 Cal.Rptr. 701; see also People v. Murphy (1982) 127 Cal.App.3d 743, 748, 179 Cal.Rptr. 732.)