The young couple

You climb on their roof and move a few tiles opening a hole in the roof. You then climb in ans close the hole behind yourself.
You then locate the manhole that gives people access to the roof space.
You open it the coast is clear and you drop down quietly.
You find the couple on the bed having sex.
You stand in the dark hallway and melt in to the back ground as you watch them.
The female is laying on her back her legs spread wide giving her husband full access to her vagina. You can see his arse rise and fall and you catch a glimpse of his cock when his arse is in the air. Just before he rams it back in to his wife's pussy.
You wait until they finish you see him put his cock all the way in and hold it in there while he was making a few animal noises.
He lay still on top of his wife and you darted him there.
You then heard her say "Can you get off of me now your putting all your weight on me and your heavy? Have you gone to sleep?"
You quickly grab her as you pick her husband up and place him on the bed next to her.
You have her pinned to the bed as your tentacles massage her breasts and probe her holes. Her anus is dry and takes a fair bit of lube to get a tentacle in there. But her husbands cum has made her pussy well and truely lubed and your tentacle gets in there with ease.
You pump a tentacle in and out of her pussy while you work another in her arse.
You can taste her husbands cum as well as her pussy juices and at one point you swap tentacles and put the one from her pussy in her mouth.
You then flood both of her holes with lube and then plant your seed.
Erase memory and plant instructions.
No need for fake memory she was already having sex.