On TD Aeroplan visa
website, it says "
For greater certainty, a Primary Cardholder or Additional Cardholder who holds Aeroplan Elite™ Status, may additionally take advantage of the lounge access benefits available to them as part of the Aeroplan Elite Status program.", not exactly the most straightforward description but it sounds like one could bring 2 guest if they have both the card and status.
TD can say whatever they want. And there is a difference between interpreting "may" as "our card holder might be allowed additional access and we have done something to ensure that is the case, come at us if it goes poorly" and "you may try, either way, you are on your own".