What "investment income" is there ?
Did you not get put on the deed as well ? Or was it only the loan ?
Is this your personal residence as well as theirs ?
And you did not refinance or buy anything. So are you trying to deduct the mortgage interest paid on the Sch A ? You can only deduct what you actually paid and between you both you cannot deduct more than 100% of the interest reported on the 1098 form.
