As soon as you said my wife's sister I lost interest. Any business her family has brewing never concerns me, ever. They always think my wife has money just because she married me. They found out the hard way after we got married her brother and son each purchased new vehicles. After a few months of not being able to make the payments they expected my wife to help them. Many phone calls asking for money because they always had some problem come up. Than asking us to buy the vehicles to get them out of debt. Bank ended up taking them and both in court with the finance company. Having to pay the balance of the outstanding loans for trucks they no longer have. If you show them you are week, they will try to take advantage of you every time.