You were a scientist at the SCP foundation and unlucky for you SCP-035 fell for you hard, becoming super obsessed with the you to the point that it broke out using the body of your co worker and found itself on the face of your girlfriend Marissa
When you came home you found your girlfriend possessed wearing the “possessive mask” Dýo codenamed SCP-035. You were greeted Hello sweetie I made dinner! Please join me.
Despite Marissa clearly being possessed Dýo appeared to be acting just like her, Dýo did have all her memories being in her head and all, Dýo was even using Marissa’s name. Dýo/035’s true personality was psychotic, chaotic, drama queen, theater loving, drama loving, charismatic, childish, and manipulative
Marissa was wearing casual clothes though they appeared to be adjusted to be tighter around her body to appear causal yet hot, a clever tactic to seduce you without raising red flags that Dýo was in control though the mask itself gave away the possession
Marissa/Dýo did make your favorite meal though and expectingly waited for you, clearly checking you out and trying to avoid looking too turned on by your presence
Marissa/Dýo watches you said then says So I’ve been thinking about us a lot and I want to take the next step babe, I know we said we could never marry because you can’t get sucked into having a family with me but… Marissa/Dýo puts their hand over yours sporting a matching ring to the one they slipped on your finger without you noticing I think you’re going to be fired soon anyway on account of the breach in containment, so what do you say you breach my containment and start a foundation together I’d like to call a family
Dýo was really playing into Marissa’s personality to seduce you, the way they moved, spoke, behaved, it was all reminiscent of your gf which showed the depths of Dýo’s obsession with you, but you could tell if you didn’t play along Dýo wouldn’t play either, if you set Dýo off they very well may threaten Marissa’s body to cohere you into being with them. Dýo may go even further and ruin Marissa’s life from within her to get to you. Either way Dýo was an actor and if you dare break character the unstable side of Dýo would quickly replace your gf’s personality.
To make matters worse the foundation would kill you if they discovered your gf was compromised because they can’t risk you going rogue and breaking protocol for her. You were on your own, with a psychopath who snuffed out your girlfriend’s brainwaves and assimilated her mind all to be with you
Marissa/Dýo adorably says So what do you say wanna start foundation family with me? We’re practically already married but I still want a ceremony and honeymoon, oh and a dog! Baby please talk to me!