I feel like the modern Hollywood trend for constant plastic surgery, as well as things like botox, have ruined our expectations of what women should look like as they age. Celebrities like Elizabeth Hurley who have obviously invested a fortune in anti aging procedures can look great in their 50s, but that's not normal.Incredibly beautiful early on, aged like milk. By the time she was in her mid-30s on Moonlighting they were already shooting her closeups in soft focus, and that was before HDTV.
If nature takes it's course, women start to get wrinkles in their mid to late 30s. Perhaps Cybill Shepherd just didn't want to go under the knife?