If your sister is staying on points, or a member-discounted cash stay booked via MS, she will get one "filter" pack of regular coffee and one of decaf. She will not get more until trash & towel day and/or full cleaning day. Most members bring their own coffee and filters. I know one pack is not enough for us and I prefer my own brand, anyway. Believe the filter packs are the Maxwell House brand if that matters to you or your sister.
If your sister booked her stay via CRO/WDWTC or a TA and is paying cash, she will get the coffee supplies replenished every day. It's part of the housekeeping service.
As spiceycat and SOBDOSNV already posted, there is an ironing board and an iron in the closet.