Can I get in trouble for talking to more than one buyer at the same time?

Generally, no — a confidentiality agreement on its own typically restricts what a buyer can do with your information, not your own freedom as the seller to talk to multiple prospective buyers at the same time. Confidentiality and exclusivity are two different commitments, and signing an NDA with one buyer doesn't, by itself, promise them you'll stop talking to anyone else.

Exclusivity is a separate promise, and it's the one that can actually restrict you. It sometimes appears as a standalone clause within a letter of intent, even though most of an LOI's other terms (price, structure) are typically non-binding until a definitive agreement is signed. If you've signed an LOI or any other document containing a "no-shop" or exclusivity clause, that specific provision can be binding even while the rest of the letter isn't, and talking to other buyers during that period could put you in breach. Before assuming you're free to keep talking to everyone, check whether you've signed anything — an NDA, an LOI, or a separate exclusivity letter — that includes this kind of commitment. A Treadstone business lawyer can review what you've already signed.