6 is a nice size litter for a Lionhead and if there were no stillborns I would certainly give her a few more chances.
Are you certain she is sable frosted? I have a sable point frosted mini lop but she looks nearly white with frosted ears. I also get very light looking American Chinchillas, that resemble this doe, who have some unknown modifier making them lighter.
Assuming the doe is a frosty - because they are both non extension as well as agouti you will get more orange for sure and never get chestnut BUT if she is just a light chinchilla you will get chestnuts.
Buck = A_ B_ C_ D_ ee
Doe = A_ B_ cchl_ D_ ee (or if chin fosty = A_ B_ cchd_ D_ ee or if chin = A_ B_ cchd_ D_ E_)
Depending on hidden recessives the two carry you could get frosty or possibly torts, sable points and other non extension colours.