Can she ask her husband to use a condom to protect herself if he marries another wife?

No File Exists
Check below answers in case you are looking for other related questions:
Does she have the right to ask for divorce if her husband is having haraam relationships with other women?
If he said to his wife, “You are thrice haraam for me,” what is the ruling on that?

No File Exists
Related Answers:
Talaaq of one who is mentally ill
He said to his wife: If you have problems with me I will send you your papers; does this count as divorce (talaaq)?
Is premature ejaculation grounds for divorce?
Does she have the right to ask for divorce if her husband is having haraam relationships with other women?
If he said to his wife, “You are thrice haraam for me,” what is the ruling on that?

Recommended answers for you:
Fatwa from the Standing Committee on the “Business and “Hibbat al-Jazeerah” companies and pyramid marketing schemes
Are there any du’aa’s specifically for protecting a new house?
Ruling on drinking whilst standing
The virtue of patience
The truth about the Mahdi, and the order in which the portents of the Hour will appear