The Scarlet Witch

As you moved through the tower, effortlessly, your now-heightened senses heard somebody...relieving themselves of stress rather thoroughly. Heading towards the source of the noise, you phased through the roof of Scarlet Witch's bedroom, where to your surprise the black-haired mutant sat on her bed, dress hiked up around her hips and three fingers rapidly stroking her pussy. Intriuged, you prodded at her mind - for some reason, she was unbelievably horny. With a smile, you used your newfound powers to double the thickness of the walls and door - which you locked, of course - and make the room soundproof.
No interruptions now.
Then, as you realized she was approaching orgasm, you decided to flick a switch in her body that would make her unable to cum without a cock, and then increased her horniness even further. Wanda let out a frustrated moan, and rolled over onto her front, speeding up her fingers as they audibly slapped against her flesh. The pose she was in was quite pleasing - a good view of her perfectly round ass, and her pussy being rapidly frigged.
Taking one last measure - making her not panic at your appearance, making her powers unable to affect you, and making her willing to accept your 'aid' - you appear in front of her with a grin.
"You look like you need some assistance."

Wanda stares up at you, gasping, her cheeks flooding with embarassment. "O-oh, I'm, uhm-"

"Horny." You grin, walking up to her as she scrambles to her feet, tugging her dress back down. "But you can't cum, can you?"

"...no..." She says breathlessly as you pin her against the wall. Your hand strays to her large E-cup breast, which you squeeze. She let out a pained moan of pleasure, grinding her pussy against your leg. "...I...I want to cum...so badly..."

"I'll help you." You grin, twisting her breast through the dress. "If you promise to keep this a secret."
"I will!" She practically screams, almost humping your leg. "Just - oh, god - just fuck me already!"