Embedding a fillable form into Constant Contact email

I'm looking for a way to embed maybe google forms or something that allows the consumer to fill in information straight into the email. I know you can embed google forms into emails for outlook, etc. But I can't find a way to get it to be fillable inside an email sent via Constant Contact. I don't want to place a link for the readers to click on and take them to another site to fill in the information.