Debt makes you do things

My best friend thru high school is still a good friend of mine. He was the friend that dated girls but if he wasnt getting pussy he would visit me (who was still very much hiding my sexual tendencies from other) except for Dave. Several times over the years he would go on a date then come over to my house blowjob, hand job, and a few times fucked my hole. This continued all thru the years even when he was engaged. On his bachelor party night we went to strip clubs in south Florida and at the end of the night I was about to go to bed when I heard a knock on the door and it was Dave. I sucked Dave off that night and then we went years with nothing as he was enjoying being married. I would visit and have dinner with him and Beth as friends as a normally group of friends going out for drinks, dinner, and trips. About 3 years ago I needed some extra cash to cover replacing my HVAC unit so I called Dave to ask for a small loan. Dave said yes but had a condition and said to come over before 6 today. I texted Dave when I got off work at 4 and told him I was heading over he said he was there and is in the shop. Dave and Beth lived in a upper middle class area and he had a detached shop/garage on the rear of the property. I parked and walked around to the shop I walked in and Dave was drinking a beer and had another one sitting out for me. We talked a little and then I mentioned the loan and told him I could pay it back in about 6 months and told him to charge me interest. Dave said reached in his pocket and laid out 8k in cash and said if you want this loan here is my terms. Pay back atleast half in 6 months and all of it within 2 years. I agreed and said thank you but what about interest. Dave said no interest you just have to do this part of the loan instead. He said as long as you still owe a penny on this loan you have to get me off when I say no matter where or when. Since I had done this for years before only stopped for his last 8 years of being married I easily agreed and Dave handed me the cash. I told him thanks again and put the money in my pocket and told him i would see him tomorrow. Dave said take care of this first as he pulled out his hard cock. His cock was had gotten larger itbwas about 6.5 inches and thick at the base and curled like a banana against his stomach always. Now he was about 7 inches and more girth and curled upwards but up against him like before. I said wow you are serious what about Beth. He said she doesn't need to know and I am dead serious. I haven't been sucked off in 4 years and want to do some catch up. I squatted down I put the cock I have sucked the most back in my mouth. My excitement and his lack of Cumming caused this to be the quickest blowjob I have ever giving. About 40 seconds into it he said oh fuck and shot his heavy salty load in my mouth and I eagerly gulped down. This continued when ever and however for the next 3 years. Gas station bathroom blowjobs, public park restroom blowjobs, in the car blows, and anywhere in between. We went to Jack's one day for lunch and as we walked in the restroom to wash our hands he said blowjob and he stood on the toilet as I sucked him off. I still owe him 1 dollar so everytime he wants to blow a load he calls.