If a fasting person eats or drinks in Ramadan or a voluntary fast out of forgetfulness, then his fast is complete and he does not have to make it up.

If you rinse your mouth or nose while fasting and some of the water goes down into your throat without you intending it, that does not break the fast.

Lying is prohibited and the one who lies to get a leave should repent to Allah. Lying does not break the fasting but it detracts from the reward of the one who is fasting.

You may engage in foreplay with your wife while fasting, kiss her, embrace her and touch her, if you are certain that you will not ejaculate or have intercourse. If you engage in foreplay with your wife until you ejaculate, you have committed a grave sin. By doing so, you invalidated your fast and you have to offer expiation.