Vortigaunt threesome?

Got half life 2 whilst it was free. I was playing through the route kanal level and was I the only one to notice the secret cutscene in the sewer?

That part where you slide down into the sewer. There was 2 vortigaunts f..u..c..k..i.n.g and splashing mud everywhere, one was saying "the vortigaunt feels good" and "the vortigaunt must f..u..c..k harder"

I started freaking out because I didn't realise half life had nsfw scenes, and plus my mom was in the room aswell, and of course it happened when my headphones disconnected

Then a third vortigaunt emerges from out of the mud and says "the freeman must join us". When I walked over there it started automatically playing another cutscene. Gordon took off his suit and got undressed and started thrusting the bottom vortigaunt, then all 3 of them started saying "the freeman excelerates at all tasks"

Wtf valve? Has anyone else seen this? Maybe I'm the first to discover it. It's in a secret passage behind some boxes in the sewer
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Did i ever told you guys about the time my friend Keith was in City 17?, this guy Dr. Breen, a real pain in the ass, my buddy Kaith says that he drank the water there, blacked out, and when we waked up he was in front of this guy called Gordon Freeman, he was the leader of a resistance there, because that place is really bad, like people against a government movie bad type, but like he didn't wanted to fight, not because he didn't care but because things were real bad, people shooting eachother and bombs and stuff flying, like he just wanted to go home, and so he did, he says that a guy with a briefcase helped him escape that place, but when i asked him how did he escaped, as things were looking pretty bad, he just said that woke up in his bed, i think it was all just a dream but he says it really happened, he just doesn't remembers how he got back home