New dog at my house

My daughter has too many dogs, I baby sit them a couple times, the pit is always trying to get at my crotch,I'm a older man, never thought about animal sex, I've been alone now for several years,his name is Tux,his white and black, when he sits it looks like his has a tuxedo on, hes his name, I'm horny, I decide to watch some porn and stroke my pierced cock,my decent wife loved my P.A rubbing her gspot,Tux pushes up between my legs and starts licking my cock, WOW!,new feeling,he tries to get at my ass and does, instead come, I ponder on this for a couple days, his showed my his cock a few times before, didn't think anything about it, just a dog.I'm horny again, I wounder what he'll do if I get down on all fours in front of him, I do, he licks between my balls and ass, he starts licking my ass hole,oh! My God his tongue goes into me, slowly he continues to go deep inside me with his tongue, my cock goes hard and leaking, he mounts me and hooks his front legs around My waist, his starts humping at me, two or three tries, I feel his cock spread my ass lips open, he starts ramming deeper into me, it's so fast, I feel a bulge at my asses opening, he pulls his fore legs tighter against me and rams the bulge into me, I all most pass out, so intense, his phase slows, he jumps off me and turns, we're butt to butt now, I feel his knot getting bigger inside me, I try to pull away, no way, I'm his bitch now, his going to breed his bich now, I feel every pulse of his cock, bigger and bigger he gets, my ass hole is expanding with each pulse, his locked inside me for about half hour, I've comed several times, haven't touched it at all, his come is leaking out from my ass even though his knot is still very big, I'm sure I'll be leaking his come for a while, he finally starts getting smaller, he slides out of me, I feel empty now wanting him back inside me.
Never thought I'd want a big cock deep inside me before till now,can't wait till he fucks me again.