Sounds pretty normal. Boas go through some color changes as they age, developing more yellow and losing their 'baby grays' which can end up bringing out more reds and pinks. Lipstick sunglow and coral albinos are great examples of boas coloring up with maturity. Boas tend to show the most pink along their sides and cheeks.
Also, pastel is not a morph in the boa world as it is with BPs, but rather a normal variation. High color animals bred together typically make higher color offspring. People have line bred nice examples to establish their pastel lines.
Edit to add - pastels are generally defined as high color with reduced black, which allows the pinks to show up more
Hope that helps!
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