Taking a walk in the woods with your stepmother wasn't as surprising as you thought it would be. Whenever you, and your parents use to go into the great outdoors for hiking, and picnic's, but that was in the past. You were now at the age of 15, your mother is gone, and has been replaced by this weird stepmother you now live with.
Finally, Christian stops at a massive lake, where you wonder why she would stop here. "You know, when I married your father there was something I never noticed, and that was you," your stepmother explains. "I didn't think he would have a son, up until he showed me the house, and of course you were found out. I just want you to know something though." Just then, you see Christian take her shirt off, along with her bra. "I might not be skilled enough to be a mother, but I'm sure we'll work things out."
You then see Christian take off the rest of her clothes, leaving herself entirely naked, which signaled you to block your eyes, and then she dove into the water.