The relation between your sister and your husband is possibly the most delicate one - Full of respect and at the same time a bit naughty and friendly too, but can it make you feel secure at any point of time? Well, there are chances that your sister's behaviour towards your husband can make you feel embarrassed, more so when she gets too comfortable and casual in her gestures and conversations. In such a situation, you would definitely find yourself in a sticky spot without having a clue whom to confront - your sister or your husband. Because if your talk to your hubby, he might feel you are suspecting him and speaking your heart our in front of your sister may spoil your relations with her for no reason as such! And it gets even worse when your sister has been like this all through her life - casual and friendly with everyone without realizing what limits she needs to maintain with different persons. Here, it becomes your responsibility to make her understand that when she is in front of your in-laws and husband, she needs to tone down a bit and behave in a proper manner. Now it's the way you approach her that would decide whether she understand your point or takes you in a wrong way. But it's important to talk it out rather than keep sulking.