Jenny can be hypnotized using a pocket watch when she and Lina are by the tree.
To trigger her breast expansion (BE) scenes, you must give her specific milk and use a "moisturizer" interaction during the massage scene. Cabin by the Lake Download [v0.14d] В» FAP NATION
A major path involves asking to borrow Lina's camera during a conversation with Jenny. Jenny can be hypnotized using a pocket watch