Watching your half brother exit with his dick between his breasts still is a bit strange. He seemed less embarrassed and more relieved and it was clear when you entered the bathroom. Your nipples were still driving you mad with their sensitivity.
He says:"you had a long day at work. A shower an some... Relief will do you good"
He said it quite sincerely but seeing him with a cleavage from which the head of his penis peaked out of was a not the situation you would see him say it in. He went to bed surprisingly he didn't first go back changing back. He takes the panel with the button and says: "ill try some stuff. You go in.". He had a lot of fun in there. He can probably make it fun for me too.
You go in. You already feel changes happening. Your vagina swell and your hips widens. Your butt grows you try to go into the shower cabin but fail. Your hips are to wide."you want me really take it easy huh". You turn on the faucet of the bath, regulating the temperature. You need to bend down a bit for it. It is quite a big bath. You want to sit down a bit but find yourself higher than expected on the stool.your butt had grown by a lot. You decided to sit on the ground and warm yourself up. Your hand went slowly over your pussy lips which started to open up. You looked at the huge bags of white liquid laying at the other side. You went over and moved your body over it stimulating your pussy by the movement. You do this for a while, lubricating it your juices as you start to notice a growing weight. The bag was deflating. Scared, you try to get off the bag and see if it had bursted a leak somewhere. As you got off the bag you have found where the cum went. Your belly had grown. You looked pregnant. You are pregnant? Hopefully not. You continue pleasuring yourself and got through a whole sack of cum. The bath finally filled up and you dragged yourself towards it. You slowly lower yourself into it. Making much of the water flow out. Your volume had increased a lot of course. "Ahh" you exclaim. Work really tired you out this week. You warmth slowly makes you fall doze off. You feel something move against your leg downwards. Your hand goes towards it. You touch it. It twitches. You twitched. It is you. You have a dick. Your hand goes a long the shaft downwards. The shafted ended up with huge balls. The movement made your member twitch and harden slowly. The head slowly surfaced. It felt great. You continue tease it till it fully erect. Every twitch send a ripple through the water. You grab it with both arms and start pumping. Your belly started to fade as your breast plumped up. Your became engulfed in you boobs. You gave yourself a boobjob lubing them up with soap. They massaged it amazingly, though the movements you did to keep pumping were quite tiring, your lust got you through it, as a white fountain spewed out of you. It kept going though, your balls started absorb the water and your member now spewed water. A chuckle left your mouth as seriously started to clean yourself and leave the bathroom