I wrote about it in more details, before, but basically, My dad was going away for 2 weeks and asked me to stay over and look after his Husky, who he only calls Buddy. I agreed since it was close enough and I didn't have too much going on. The first few days were not that eventful, with exception to the occasional humping, which i was told to just gently push him away if it got to me. I didn't feel much initially and didnt really feel his dick or anything, so though he was just going through a playful Horny phase. Until one time, I was slightly turned on myself, and when he began humping, I kinda didn't think much and started encouraging him. Bit by bit, just rubbing him all around before reaching down. I stroked down there and felt him harden up, and I played a bit more, before stopping for the time being, and just finishing by myself. But I guess that worked as encouraging him, and he'd get more aggressive more frequently. And That on it's own was a turn on for me. So around one night, granted without much research, I took the opportunity. I got him over and let him go off on me for a bit, before I did the same process as last time, taking his dick, massaging it out properly, and this time, I decide to take it in my mouth for a bit, not much, just to get see how it feel. I also made the mistake of seeing the knot and underestimating it, thinking it's not that big, I can take it. I suck on him for a bit and he lets it happen, before I lean over and try to get him to mount me. It took a bit longer than I thought, but initially, he would just hump my butt, come close to getting it in my pussy before just getting over, humping my back etc. It took a few tries but I managed to guide him in, and I felt his massive dick enter. It was probably the most thrilled I felt in ages. I had to guide him back in a few times cause his thrusts were very big. It got easier tho as he got deep in, and it was the first time I felt pleasure like that. And that's where I learnt that the Knot does infact get bigger. At first it hurt, but I also wasnt thinking straight and his thrusts got consistent as the knotting happened, before I felt just hot strings of cum shoot in me. I was basically done at that point, pain and pleasure both overwhelmed me. And we stayed like that for a bit before I gently had to separate us. I let the cum stay as I put him out of the room, then cleaned myself off. (copied it off the my old answer)