Buying an Interest In A House

2 Individuals. Not married. She has agreed to sell me her interest in the home. She insist that the lending / title company makes the check out to me and I give her a check directly. I was going to have lender / title company make the check out to her. Could anyone tell me why she would insist on the lender making the check out to me and not her. I kind of got screwed when I went in the house deal with her (she put her name on deed/ title but not on the loan). I just want to make sure I am covered in every way possible. Thanks.