Rough Idea - Succubus Riley Ch2 (Patreon)

A very rough idea of what happens in the next part of the Riley story. This takes place a few days to a week after the last part. Riley has recovered enough strength, and the succubus inside her, Eisheth, wants to take her body for another spin. While in her dorm room alone, Eisheth appears in the mirror, much to Riley's shock. 

Somehow, Eisheth's dick gets transferred to Riley. Then in the mirror world, Eisheth mounts Riley and rides her until she's about about to go off. In that moment of desperate weakness, Riley succumbs to temptation and let's Eisheth take her body over again, anything to have release!

The part I'm stuck on is how Riley ends up with a dick again. Some ideas:

• Eisheth pushes on the end of her own dick, which causes it to shrink at the same time Riley starts to grow one
• Eisheth goes down on Riley, causing Riley to grow a dick that goes into Eisheth's waiting mouth
• Eisheth fingers Riley until she climaxes, causing Riley to grow a dick.

Do you have any other ideas for how Riley gets her cock?