As upset as you may be, it is important for you not to let your anger prevent you from thinking clearly about this situation. Wanting the 14 year old or your 16 year old to be punished by imprisonmen is not the answer.
Because you still have the ultimate control over your household, if you don't want them to see or talk to each other in your home, that is your decision. However, maybe -just maybe- they really do love each other and they are going to have to live with with each other and the kid somehow.
Nevertheless, you should start by talking with the 14 year olds parents. Because he is a minor, there is a chance they may offer help through the pregnancy.
Most information that is availible online is not entirely clear about the age of statutary rape and the ones that are, are out dated. For example, One source says the victim has to be under 14 years and the accused has to be an adult. The other one states, First-degree statutory rape if actor is 17 and has intercourse with person <14; second degree if actor is >=21 and victim is <17.
Therefore, I would suggest you contact your District's Prosecuting Attorney. Initially, burdens of proof relies a great deal on trust – in victims and in prosecutors – that the omitted element will truly be present when cases come to trial.
However, in this case, it appears your daughter may be at fault and proceeding futher may generate a criminal action. These charges can be brought about by his parents or the state.
You must also contact a Defense Attorney. If the laws places your daughter over the age limit of having sex with someone 14 or under, the 14 year olds parents may decide to prosecute her.
A Defence Attorney can advice you better about how you should proceed with this matter. From the way that I look at things, there is not much the law can do, this time, for either party.
Hope this answers your question!
ADDITIONAL RESOURCE(S)
The Catholic Diocese of Allentown
The Diocese of Allentown: Pregnancy Support REFERENCE(S)
1. Sherry F. Colb, 2004.
CNN.com - The pros and cons of statutory rape laws - Feb. 13, 2004
2. Guttmacher Institute, 2007.
Can Statutory Rape Laws Be Effective in Preventing Adolescent Pregnancy?