About the position of the adverb honestly

Hello, everyone.
I have a question about the postion of adverbs

(1) I honestly can't believe that you are old enough to have such grown up children.
(2) I can honestly say I haven't had such a delightful meal for ages.

I guess I can say the following as the exactly(?) same as the above

(4) Honestly I can't believe that you are old enough to have such grown up children.
(5) Honestly I can say I haven't had such a delightful meal for ages.
(6) I can honestly say I haven't had such a delightful meal for ages.

However, I wonder if I can say the below as the same meaning as the sentence Number (1).

(7) I can't honestly believe that you are old enough to have such grown up children.

Does Number 7 make a sense in another implied meaning or no sense at all? If any, what does the sentence mean?

Thank you in advance. Have a happy day.