Nikaah & Marriage Issues

Carrying someone on one's shoulders

Q: Imagine situation where a man gives people piggy backs carrying them around on his shoulders. While doing this, the man gets a turn on, he experiences arousal and an has erection but it does not go further than this at all. He does not experience any sexual thoughts at all during this. He is convinced that nothing haram would come from it in terms of failing to fulfil sexual appetitite and is 100% sure this would not happen. Is it allowed for him to give piggy backs carry people round on his shoulder considering the action itself seems halaal?

Announcing nikaah on facebook

Q: My question is I recently had my ketb ktab my families and my wifes family were present. It was recorded and placed on Facebook for all to know.  Does this count as a valid announcement? We are still planning on having a wedding celebration in a few months. But I am told I can't sleep with my wife unless I have a proper public announcement. Please clarify or confirm that the facebook announcment and my families and my wife and I telling others about our marriage is valid enough? 

Mut'ah

Q: A couple engaged in a mut'a marriage. They realized after some time that mut'a is not allowed. Is their nikaah valid or should they perform another nikaah?

Living with two wives in one room

Q: My husband has another wife. We all live in one room. In that room is a kitchen and attached bathroom included. My husband divided the days for intercourse. 1 day with me and second day with 2nd wife. Husband does intercourse under the blanket with me on my day and with second wife on 2nd day. During her turn I always watched them over blanket but can not see their body because they were under the blanket.
Another problem is that our husband orders us that me and 2nd wife wrap the towel from naval to knee during house chores in the presence of husband.

1. Is it permissible for husband to do intercourse under the blanket with wife in the presence of other wife?

2. Husband wants us to be topless during house chores and covered (from naval to knee)