You need encouragement

Thankfully the bedroom is rather well insulated, so not much sound will escape - it's also possible to lock the double doors and appart from that nobody can tell what's happening inside. You are in a postiation where just about anything you do will lead to the same outcome, sex.

You feel extremely shy, although the girl dressed up like a creepy alien makes it more strange than embarrasing. You remember her saying something like, she likes weird things or something - well you sure don't, nothing's worse than doing something out of your comfort zone.

"I...I don't know if I can do this, I... it's just too weird for me..." You mummble while your breathing speeds up. The alien girl raises her index finger up and puts it in her alien mouth. She takes it out and it's obviously wet.

"It's less weird to suck someone's finger than their penis, right? Let's try that first, ok?" Tenni crawls next to you and grabs your hand gently. You blush, but go along with this - as long as it's not your penis, or pussy, or butt, or tits, or face for that matter, you are ok with whatever.

She takes your left index finger and slowly puts it in her mouth. You twitch as you feel her very human tounge licking and wrapping over it. On top of getting even hotter, your penis starts getting erect. You moan under your breath as she starts sucking on your finger.

She stops after a minute and you take your wet left hand back. It feels kinda sore and hot, you gulp and think about hiding your obvious erection, but can't do it. "I guess that made you hard, huh? Is it ok if I do it on your penis next?"

You can't say it, although in theory you are just about ready, you just can't say it. You stare blankly up and bite your lip nervously. "It's ok, what if you just pull those panties down and we can try doing this in a different way, right?"

You can't believe that anybody could hold up with you this long, but obviously Tenni will. You feel so shy that you could die - slowly and surely you lower your panties while biting your teeth together, you wonder if letting her do this too would've been easier. Your penis flops out and you scream and cover your face. It's very hard to do this when the last few girls you showed you package basically blacked out, and you guess it traumatized you.

"B...but it's so big! I thought that girl's would have smaller penises than guys, but I guess I was wrong, hihi." Tenni says and groaps her nigh flat chest - you can make out pointy nipples. Her comment made your cock throb but your mind foggy with both missery and happiness.

"Uh, how... big is it? Have you measured it?" She is trying to obviously ease up some of the tension. It's funny but the last time you did that was in 9th grade when it was just about 7 inches when hard. You were never expecting to grow so big, especially after taking doses of female hormones throughout junior high. And to be honest, you didn't even want to go bigger than 5 inches in the first place.

"7 inches, I think..." You get that out of your mouth and sigh. "Really? I think that it must be at least 8 inches really..." You know what... let's measure it right now." Tenley hops off the bed and rounds around the room and sticks her hand in a crevice between two shelves. She pulls out a small aluminium case and opens it - there are small tools like scissors, tape, a screwdriver, a knife and a measuring tape. You also see that she has a phone in there and sigh deeply.

Tenley hops back on the bed where you are laying with you cock hard and on show. She takes the tape and presses it suddenly on your pubic area. You scream and cover your mouth. "Oh, sorry..." She appologizes and pulls the tape up your shaft up to your foreskin covered tip. She takes the tape on a pincer grip from where the highest point was and opens her mouth and laughs.

"Ha haa! Look! 7 1/2" percisely! That's 19 centimeters!" You look at her and back at your penis, which is starting to calm down. You feel a weird feeling of pride all of the sudden. It's... a big cock huh?

"Hehe, wanna know how deep my vagina is? 16 centimeters. You would hit and penetrate my womb, you would, wow!" Tenni looks in your eyes mouth open and even when you don't even see her face you know that her eyes are glowing. You think it's time to advance.