Quickly

Reacting on instinct, you drop the sword and cross and let the beast claim you.

Immediately, your frame rips into a hulking musculature, shredding your clothes. Swiping a newly clawed hand, you make Gwen retreat back to the trap door. Your body tingles as dark fur grows out along your body, bones cracking as you are remade into a werewolf.

Gwen, however sees the threat you now pose. As you rear back, howling as your eyes turn amber, she jumps into your chest with blinding speed, taking you to the ground. Wasting no time, Gwen sinks her fangs into your sinewy neck, and you experience still more excruciating pain.

"GROARRR!" you snatch Gwen off of you and hurl her into a coffin. With a trio of hisses, the brides streak toward you. At this point, you know they can be beaten, and you give the beast a little more control and black out momentarily. When you regain control moments later, the Brides lay dead before you.

Turning to the recovering form of Gwen, your cock twitches in approval of how her ass has been completely exposed by her shredded dress. Grabbing your huge member in your hand, you approach Gwen, stroking yourself to your full twelve inches. Suddenly, you feel an immense pain stemming from the bite Gwen inflicted on you.

You fall to the ground grabbing at your bleeding neck, and look up to see Gwen, now nude, standing astride your head.

"Those brides said they could free you of your curse. Instead I shaped it; you are becoming a Nightwolf: a cross of vampire and werewolf. Nightwolves can only be created when a vampire bites a human who has not fully become a werewolf, or if a werewolf catches a human before vampirism fully claims them. Now you, lover will be more powerful than you could ever dream...Just let the change into your heart!"