Try asking her dad's permission to marry her. Let them get used to the idea of the marriage before you tell them about the pregnancy. You don't want them thinking that the only reason you're marrying her is because she's pregnant.

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Life is too short not to love and be loved....preferably multiple times in one night.

I think men talk to women so they can sleep with them and women sleep with men so they can talk to them. ~ Jay McInerney