Lick, lick bite is a cat affection into play thing. Its like eating a tootsie roll, it just happens. Sometimes the big cats bite hard enough to make the little ones squeal while pinning them and sometimes its to teach them boundaries and not for play, but its all normal and fine. At its worst, its like a big brother giving a little brother a noogie or indian sunburn. Big cats dont bite kittens for real, but if the kitten was being hurt, you'd see the kitten avoid the big cat at all times, not just during rough play. Sounds like this doesn't even rise to the level of the kitten noticing it yet, so its a purely good thing I'd say.