You were at Delaya's house when it happened. The day you were converted to join the symbiotes. About to take a bath together, you both heard a noise, perhaps her sister had come to visit without warning her.
As she was about to peak her head out of the bathroom door a tall muscular figure broke through; grabbing Delaya, beginning her conversion.
As the symbiote spread to Delaya, the tall figure pointed at you. In that deep gravely voice, the tall symbiote figure spoke: "WHEN WE'RE DONE WITH YOU- WE'LL MAKE SURE YOU MAKE HIM JOIN TOO~"
Delaya looked back at you as the symbiote entered her mouth, before slithering down her throat.
You had no choice but to watch on. Watch her bonding with the symbiote against her will. Knowing you'll soon succumb to the same fate.