I thought people had said previously that they're in business together (can't remember if this was suspected or confirmed) & that's why she's keeping schtum. Did someone maybe say Erika invested in rinnas lip line?
I think she'd have been mental to fake it because life seemed pretty good, no idea re rumours of marriage dwindling & if it was maybe she felt he wouldn't leave her if unwell, seeing them together on the show you'd think she'd have had more chance of keeping him by being fit & healthy & beautiful as she was at her prime. Though if she genuinely had Munchausens it's a mental health/psychological issue so logic wouldn't necessarily control your decisions.