I'm getting married in September and have just sent out Save-the-Date cards to all of our guests. My mom has said that some of her friends who received the cards have already said that they cannot attend. My question is... do I still follow up with an invitation here in a few weeks? On the one hand, I haven't heard directly from these guests that they cannot attend so it seems right to send the invites anyway, but on the other hand, I don't want it to come off as "Yes, I know you can't come, but please send me a gift anyway." Thoughts?