Arranged Marriage

My sister is pregnant.
She is 23 years old and not in the best place in her life. She's had...troubles. Drugs. Alcohol. Depression. Suicide attempts (lots of them, starting when she was 8-years-old). It isn't the best time to have a kid and she's considering abortion.
I don't want her to abort. It isn't religious with me. Without any strong belief in any dogma or god, I can't say that the religious morality of the situation plays any role in my feelings.
But this zygote is part of her. Part of this beautiful person I love. So I love it already. I don't want it to not exist because it DOES exist already. I want to get to know the person it will become. Also, I feel that my sister would suffer with regret and wondering and I hate the thought of this tormenting her for years. Right to choose is a good thing. I don't want some asshole lawmaker taking that away from me. But once the pregnancy occurs, it's an all-in or all-out proposition, and there's a high emotional cost whichever direction you choose.
I would be a pretty crummy mother myself right now. I work like a maniac and I feel sad a good deal of the time. But I would certainly take the baby if she doesn't want to raise it herself.
But she kind-of does want to raise it herself. So she asked for my help. Could I bring her out to Italy? Could I help her through the pregnancy and watch her like a hawk: keep her from alcohol and cigarettes and drugs? I will certainly try.
But the problem is the damned Sojourner's permit. I have the right to live and work here - but she doesn't. The best case tourist scenario gets her here for three months. Not nine.
So I called HR. Let's start the steps for making her my dependent. Then, maybe, I can finagle a visa, and access to the U.S. military base and medical care. I don't know if it will work, but its worth a try. It isn't looking good.
So, I found myself look at Dan. Dan is a lieutenant in my office. He is 32 years old and interested in riding his motorcycle and filling his facebook page with travels to different European cities while he's here. He's thinking about maybe someday getting married and having kids. He's a nice guy. So I asked him to marry my sister.
Why not?
What did I have to lose? If he married her, I could bring her overseas and she would get good medical care. I suppose I'm a bit skeptical about marriage. God, it would be great if it was that sacred institution: that place of support and love and caring. But I look at the marriage Sjors has, and the marriages of so many other people I know who execute the modern version of the power/political/economic marriage which has dominated human history. So I thought, "what the hell? IS there a better reason to marry someone than to truly help them out?" I would have worried if Dan was some sort of romantic who was on the track to a deep and meaningful love-match, but he isn't really there. At all. I thought: maybe he'll go for it.
Well...not really so much. He flipped out. I felt like an asshole for broaching the subject.
If someone had asked me the same thing... I don't know if I would have freaked like that. I think that my primary concern would be that I might prevent myself from finding love or acting on it. Dan's concern was that she might have a claim to part of his income or retirement after they divorced. Okay. Whatever.
I have to figure out how to help this little chica. Apparently, I have no shame.