My question is how much affection is it appropriate to show for husband and wife in fron of other family members? What does islam allow or encourage? Is it ok to hold hands... for a husband to put his arm around his wife ... for a wife to sit on her husbands lap ... a kiss on a cheek ... say i love you on the phone when there's other family member present?

Could anyone give some examples from Quran or hadith, what did Prophet used to do?

Jazakallah to anybody trying to enlighten me.