I agree on all points. When I read to my children, I would embellish, (with words -- or more often, with sounds) but often, a re-write was in order and I got so I could do it on the fly! I'm guessing you'd be pretty good at it as well ;-)
The last book I read to my son (now 12) was "A Wrinkle in Time." Quite the challenge, especially on a bad tongue day!
English has something called (I think) progressive assimilation in voicing, which means that if a consonant is unvoiced and is followed immediately by another consonant (without an intervening vowel), then the second consonant also becomes unvoiced. Similarly, if the first consonant is voiced, then the second consonant also becomes voiced. This why "loafs" is pronounced with an "-fs" sound at the end, but "loaves" is pronounced with a "-vz" sound. By the same token, "asked" is correctly pronounced "askt" in Standard English, just as "booked" is pronounced "bookt", "blessed" is "blest", and "rushed" is "rusht". So go ahead and pronounce that "d" as a "t" and feel good about yourselves!
It's annoying because it's used all the time in young children's books. Especially poorly written ones where the author is obsessed with using synonyms for said: characters ask, respond, answer, reply... it makes my piss boil! It's what they say that mattters, not how you narrate their saying of it. Bad writing aimed at children, far from being excusable, is more deplorable than bad writing for adults! And yet so many talentless chancers with a grant, or semi-literate illustrators, are foisting their mediocrity on the kids' sections of our public libraries these days. It's the best of times and the worst of times. Rant rant rant.
I'm with you on that yarb. As soon as you've negotiated the "sk" -- BAM, you've got that darn "d" and it's almost impossible to not make it sound like a "t." To enunciate it properly, you end up sounding like you've got peanut butter stuck to the roof of your mouth. I mean, what the hell?