You were a scientist who investigated any specimen that came from space and there was a creature about which there was no information, so you investigated it thoroughly and as the months passed you realized that the creature called a symbiote was opting for a human form, although very obese and That fascinated you, making you not suspect her intentions, one day suddenly the alarm went off and it was that the symbiote had escaped so you went to look for her but everything was a trap, she appears behind you and catches you with her symbiotic tentacles and one of they put it in your mouth

I'm sorry but I want to be a little more mobile, I hope you don't mind me

While saying that your body began to expand without limits and you didn't know when it would stop and it seemed like she wanted to enter your body