Here is what I can tell you as a woman..........she did NOT ask you about this because she does NOT want to do it!! She wants you on board with her doing so. And if you don't agree and encourage this, she is likely to do it anyway without your approval which creates serious problems when she does and gets pregnant (something she wants currently).
You need to sit down with her and have a serious discussion about this and if you don't both agree about the likely outcome (a pregnancy) get her an IUD or on birth contro pills (not morning after pills, they don't prevent pregnancy....they prevent ovulation if it has not happened already) or you will find yourself dealing with an unwanted (on your part) pregnancy after the fact. If dshe has not done this already (its been 6 months since the initial post), she will soon.
J (the wife)