thats ok
wow her belly does look big, looks like a 5-6week into kitten belly!
... however! bengals do get a nice full tum when they eat, im always getting asked if they are pregnant! im like erm no!! its a food belly lol!
but her nipples are completly white, hmm its a hard one to tell, but due to the nipples id go with a no, when should her next call by? it is getting colder now so if she is indoors with the heating on she should still call (got 4 calling here driving me nutty!) she may have absorbed aswell, id maybe ask the vet to check her and see if you can have a course of anti'bs, my girl mated about 5 months ago now, Im sure she was in kitten but a few days later I knew that she wasnt, just incase she absobred the vet gave us a 5-7day course of anti bs, she then came back in to call after she had them but still hasnt mated, and I own the stud lol!! so im guessing that she wont have babies! same sort of situation as you raelly!
edit - ill try and find a picture of a cat thats in kitten and you can see what the nipples look like
ok this was mums 3rd litter, notice the nipples are very big & pink:
this was mums 1st litter, again the nipples are large and pink, this was the night before she had the actual litter:
can you see the difference with your girls & mine?