I know this answer is a bit late in coming, and may no longer be useful, but you provided the requested information, (thank you) so I'll give it a try. Here is what I would do:
I would put a comma after 'and', because the verb has a new subject.
I would not put a comma before 'too' in final position in this sentence.
thank you for your reply, I appreciate it.
You said you'd place a comma after "and", like this:
My sister loves to cook this for her family and, I hope you will too.
Isn't it more logical to put the coma before "and", like this:
My sister loves to cook this for her family, and I hope you will too.
If not, could you please explain why comma after and not before "and"?
One more question, if I may:
If people (readers) read this sentence published somewhere without any commas, would they realise there's a comma missing at all?
My sister loves to cook this for her family and I hope you will too.
The new (modern) proofreading style apparently doesn't place as many commas as us (older generations) are used to, and by following modern proofreading I assume there wouldn't be any commas places in this sentence. I wonder if an average reader would even notice there's a comma missing?
Thank you in advance for your opinion.