One year you go in for auditions, and everybody thinks you're the queen of comedy, and the next year, you're so 'yesterday,' and it's not because you've done anything, or your ability has changed; you haven't been in work because you've been putting on weight and then trying to lose it.
The siblings of special needs children are quite special. Absolutely accepting and totally loving, from birth, someone who is different mentally, and has a different way of seeing the world, is a wonderful trait. It's a trait I wish there was another way of getting, but there isn't. And it does involve a degree of not having it fantastically easy.
As a writer myself, my job has very often been to also write on the job. So you get the script and a vague idea of how the scene might work, and you then add funny words or change the script. I'm not the world's best writer or the world's best actor, but I can do that thing where I can fix - or ruin - fix-slash-ruin, add quirk, add value.