But you would have been acting out a conventional idea of grief to an acting class, the way a thriller writer will make someone innocent in a murder plot behave according to conventional ideas of innocent behaviour — crying, grief-stricken, unable to eat, blaming themselves, etc etc.
Real life is just messier, and grief and shock express themselves in more unexpected ways. When my beloved grandad died in my teens (he was essentially my third parent, always lived with us), the whole family got the giggles in the car on the way to the funeral, promptly infected grandad’s other son and our cousins, and we all spent the whole service trying not to laugh and failing — the pews were shaking. We would have looked heartless and frivolous to a neutral observer, but we were heartbroken. Just also laughing like drains.
I only know what I’ve read on here about this case, and have no idea about this woman’s guilt or innocence, but I’d be wary of making deductions from anyone’s behaviour in the public eye in this kind of scenario. Guilt or innocence doesn’t always look the way it would in a film.