Does moistening the lips twice in a row and then swallowing the saliva invalidate the fast?

A fasting person is not required to refrain from putting their tongue back in immediately after licking their lips, nor do they need to keep a tissue on hand to wipe away saliva. Swallowing saliva that is in the mouth before it exits does not break the fast, even if it is collected and swallowed. However, if the saliva exits the mouth and separates from it, then is returned and swallowed, the fast is broken. Swallowing the moisture from the lips due to saliva does not break the fast due to necessity, and similarly, swallowing the moisture remaining after rinsing the mouth. The Quran stipulates ease and the lifting of hardship in religion: "Allah intends for you ease and does not intend for you hardship" and "and has not placed upon you in religion any difficulty."