[-Audrey-]

The father appears to be a longhaired lilac/lavendar mackerel tabby tipped with no white spotting, a full tail, and without the polydactyl gene (ll, XoY, bb, dd, AA, McMc, II, ww)
The mother appears to be a longhaired classic black* tabby with >50% white spotting, and without the polydactyl gene (ll, XoXo, BB, DD, AA, mcmc, Wswg)

With such a pairing, the following offspring are the most likely to result:
100% longhaired
100% tipped
100% mackerel tabby
50% up to half white, 50% no white
For males: 100% black*
For females: 100% black*

*Black, when paired the tabby gene, result in a cat that appears brown. Your female cat is genetically black, but due to having the tabby gene, appears brown.

So, it's likely the kittens will all look like darker versions of their father, half with the white markings of their mother.

^ this colour, but with the father's stripes. Half will also have white markings like the mother. All will be fluffier than the above cat and like have shorter muzzles.

Saying that, cat genetics are wild. It's possible either (or both) of your cats are het for certain genes, meaning they are carriers of a gene, but do not display it, but if they are both carriers for the same gene, some of the kittens may display it. My analysis is simply a guess. You may have very different looking kittens.