Is a woman permitted to refuse intercourse with her husband due to exhaustion, illness, or severe cold? And is she permitted to wear a synthetic wig and contact lenses in front of her husband?

A wife must obey her husband if he calls her to bed, unless there is a legitimate excuse such as illness, menstruation, an obligatory fast, or harm resulting from intercourse. If she is harmed by intercourse, she may refuse. However, if the harm is tolerable, she can inform him; if he agrees to forgo intercourse, there is no sin. Otherwise, her obedience is obligatory. It is permissible for her to wear a wig and colored contact lenses in front of her husband.