Are the following ahadith authentic:

1. Prostration of wife to her husband [Tirmdhi 1158]

2. If the husband were to have ulcer all over his body and his wife cleaned it with her tongue, even then she would not be able to pay him back.

3. If the woman is disobedient to her husband, then she is committing a form of shirk.

This is the only authentic hadith I know of regarding your question:

Abdullah bin Abu Awfa said, “When Mu`adh bin Jabal came from Sham, he prostrated to the Prophet (ﷺ) who said, ‘What is this, O Mu`adh?’ He said, ‘I went to Sham and saw them prostrating to their bishops and patricians, and I wanted to do that for you.’ The Messenger of Allah (ﷺ)  said, ‘Do not do that. If I were to command anyone to prostrate to anyone other than Allah, I would have commanded women to prostrate to their husbands. By the one in whose hand is the soul of Muhammad! No woman can fulfill her duty towards Allah until she fulfills her duty towards her husband. If he asks her [for intimacy] even if she is on her camel saddle, she should not refuse.’”[1]

And Allah knows best.

References: 

[1] Ibn Majah, Vol. 3, Book 9, Hadith 1853