If a loved one asks if you would and it is in the past tense normally it’s best to say in the affirmative YES. This is especially useful when the event will probably not occur in the same way in the future. You can’t say that you’re lying because who knows how you would have acted if you were actually there and the support your loved one will feel will make up for walking this line between truth and a lie. If the event actually occurs at a future date and you don’t react the way you agreed you would, you could make up an excuse as simple as it was the morning not the night or the dog was barking. It may not make a whole lot of sense but at least your initial statement was true.