My oldest (11) is just like her 2yo sister. They both have to be fully covered under at least 2 blankets! All you can see are their faces! My son however... he is 1 and he hates being covered! He sleeps in just his diaper and always hates to be covered or wear anything while he is sleeping.
Are their sleeping habits like yours or your SO?
My son is like my DH and my girls are almost just like me. Only difference is I have to have a knee or foot sticking out from my blankets!