I (32m) have been fucking my neighbors daughter (21f)

About a year ago jim (45m) and his daughter sarah (21f) moved into the house nextdoor. Jim and I have similar outdoors hobbies and started hanging out on a fairly regular basis and have become friends. Sarah is a long distance runner and spends alot of time at the gym training, she has a body that reflects it.

A few months ago Jim had to go out of the country on business for 2 weeks. 2 days into him being away, we got a big storm and the power went out. I have a large generator so I was unaffected. At about 8pm, a few hours into the power being out my door bell rings and its sarah. She wanted to hang out until the power came back on. I invited her inside and offered her a drink since I had just made myself a cocktail, she happily accepted my offer. We hung out talking for about 30 mins before she asked if we could go in the hot tub. I told her to run home and grab her suit and we could jump in. Without skipping a beat she says "we dont need suits" and starts undressing. At this point I cant believe that she standing naked in my living room but I grab us another round of drinks and join her. After a flirty 5 mins in the hot tub she slides over to me and we kiss. After a bit of making out in the tub she asks if I want to go inside. When it got time she asked if I had a condom and I informered he that I have a vasectomy and we could forgo if she wanted. Her eyes lit up and we end up fucking for a long time. Shes spent the night the rest of the nights her dad was away and does the same every time he goes away on business. The next day her dad texted me and thanked me for letting her hangout and said "I hope it wasnt too much of an intrusion" lol. Not going to lie, it kinda hard to hang out while secretly creampieing his daughter....