Glancing is perfectly OK
Staring (that is over 10secs, or 5secsx 5) is RUDE
Tell him how you feel about it.
ignore it and move on with him.
Confront the husband first, then talk to the wife if the husband doesn't stop.
No
When she loses interest in him and is seeing someone else.
She is obviously fascinated by her husband's sister, and possibly jealous of her. It's also possible that she finds her husband's sister weird.
yup.
husband
An ex-wife can continue to use her married name. It's her choice.
No. In the US a husband has no rights in his wife's inheritance.No. In the US a husband has no rights in his wife's inheritance.No. In the US a husband has no rights in his wife's inheritance.No. In the US a husband has no rights in his wife's inheritance.
not related
Yes, a wife can refuse sex to her husband. If the husband were to force his wife to have sex it is rape.
The husband's brother is a brother-in-law to the wife. The wife's brother is a brother-in-law to the husband. However, the husband's brother is not related to the wife's brother.