In that case she manages to actually think for a few minutes.
That first screen said "live your life as an erogame". So, that's some kind of sex-themed game? Her life is all about sex now without so much as an 'are you ok with this?'
...Well, it's not like her construction job is deeply meaningful and fulfilling. But why sex of all things? Masturbating does feel good, watching porn is fun, but... The game is trying to involve other people. Directly, not just her being hot in their direction. That's vaguely terrifying. She's good at making friends but after one utterly disastrous flirting attempt as a Sophomore that ended up getting her suspended for a week she's never even considered doing that again.
She can try the 'new way to masturbate thing'. That's less frightening, since she'll be alone in her own little apartment.
She looks up 'Ways for women to masturbate' on her rickety old laptop and trawls through the results, looking for something that sounds hot. Use lube... Use a vibrator (maybe she should get one)... Edging... Ice packs or hot packs? Huh... Pillow humping? ...Watching porn while she does it doesn't count as new... Ooh, the shower head is supposed to feel good. She never even thought about that, but she can see it.
She doesn't have lube or a vibrator or ice packs but she can do the pillow thing right now. Or the shower head thing. And, honestly, a shower sounds nice anyway and she feels like being naked and seeing the changes on her body in a bit more detail right about now.
So she strips down in the bathroom and looks herself over in the mirror while waiting for the shower to get nice and warm. Yeah, her breasts are - not only bigger now, but somehow rounder and firmer-looking. She hops in place and giggles. No wonder all those guys were looking. Her muscles aren't as bulky as before, more sleek and toned. More feminine. Well, as long as it doesn't actually make her weaker, she's fine with that. Turns around and looks at her butt... Damn, girl. Maybe she should show that off, too.
Between going braless, fantasizing, and looking herself over, she's quite turned on when she steps into the shower. She soaks in the warm water and rubs her fingers over her labia, her other hand playing with her nipples, just like normal. But after building up a nice core of warm sensation she pulls the shower head down on its long hose and positions it-
!!!!!!
-Oh! That's an intense feeling. Almost painful. She has to take it away immediately... Maybe if she muffles it a bit? She holds a washrag over her labia and puts the shower head back. Mmm... Much better. Warmth and pressure and vibration and good.
She moves the shower head around a bit, finding the best position for it. She works herself up for a while like this, shower head in one hand and alternating between her breasts and clit with the other... At some point she gets used to it enough to remove the rag, and that makes it even more intense and soon she's fingering herself, panting... She adds a second finger and finds an angle that's just right and holds it for a few seconds before coming hard, pressing the shower head up against herself and almost falling over from the pleasure, basking on one of her best orgasms in a while.
And then she lets the shower head fall from her hand and sits on the floor of the shower, basking. With a deep breath, she starts noticing the rest of the world again.