Conversion to Islam

Bismihi ta'ala

This is unacceptable. Whatever the family's religion may be, Muslims must honour and respect their families. Your wife has no right to do this. 

If she has certain concerns, you should address them. There might be something she has seen, like abuse, or intimidation, or trying to brainwash your son, etc... Try to pinpoint what the dispute is about, and deal with it. 

But if it is just because she has no respect for your family, this does not give her the right to deprive her son of visiting or being with his grandparents and family. 

With prayers for your success.  

Bismihi ta'ala

If all other shar'i requirements are met, yes, she can marry that man.

The marriage proposal must take its normal procedure, primarily around the parents giving their consent and their blessings. This is the most important part. 

A second important step is to see the character traits of the person, their moral standards, their family, compatibility, etc.

A third step to take is seeking consultation and advice, trying to find out if this prospect marriage is a good idea, and the obstacles they might face. This is necessary for any case of marriage, Muslim born, or convert. 

Both of them should study this from all its angles, for the sake of making the right decision and having a successful marriage. 

With prayers for your success.  

Bismihi ta'ala

Please refer to this answer:

https://www.al-islam.org/ask/is-it-mandatory-for-a-convert-to-perform-ci...

Bismihi ta'ala

In Islam circumcision of a male is regarded as a Sunnah, strongly emphasised on, especially at a young age. The specific time that a male should be circumcised, being very mustahab, is on the seventh day after his birth. If parents are not able to do it in this time, then any time after that.

If the male reaches bulugh and has not yet been circumcised, he will be responsible to get it done. In Shi'i jurisprudence, many of our esteemed jurists consider it to be obligatory for a Muslim male to undergo circumcision whenever they can, if they were not circumcised when they were young. 

If a male is not circumcised, this will not affect his acts of worship, except for Hajj. If a man wishes to perform his Hajj pilgrimage, one of the obligatory prerequisites is that he must be circumcised in order for his pilgrimage to be valid. 

 In answering the specific question, being circumcised or performing circumcision is not a necessary condition for converting to Islam or being a Muslim, and he can do it whenever possible, even after converting. 

For any male, whether Muslim by birth, or having converted to Islam, who has not undergone the process, they should consider doing it, as there are many religious and physical benefits for it. 

In any case, please refer to the specific view of your Marja' taqleed in this regard. 

And Allah knows best.  

Bismihi ta'ala

The fiqhi ruling for this is the same for any wali amr, and she would need the consent of her father, whether he is Muslim or not. This is in the case that she has not been married before and is not completely independent in everything she does (balighah/rashidah). 

And Allah knows best. 

Bismihi ta'ala

Numerous reverts I have interacted with did face similar issues, where they feared backlash, and had to conceal their Islam. They would pray in secret, and so on. 

In answering your question, in your circumstances, your prayer will indeed be valid.

What I would like to recommend is that you correspond with other fellow reverts from your same background, and find feasable ways in how you are able to overcome some of the struggles and difficulties you might be facing. 

May the Almighty give you strength, and bless you for your accomplishments.