My Peruvian Special Girlfriend

I have befriended a girl from work over the last few years. She is short, very latin, gorgeous and a sexy smile. I have since retired and help her out with a few honey do chores. We started going out on lunch dates and seeing a little more of each other.
My wife and I are experienced swingers and we both take great care in other peoples feelings. She has told me that my intentions with my friend are very restricted and I am not allowed to hurt her in any way. So I am walking a tight line. We went on an over night trip to see The Rolling Stones a couple of weeks ago and although I wanted to really bang the shit out of her and she was willing to. We just slept naked and cuddled. It was great and I'm pretty proud of myself.
Fast forward to this week and with my friends permission along with my wife's. We went to lunch on her day off. After lunch we headed back to her place and started to make out. That lasted about three minutes and we were headed to the bedroom. Instantly the clothes came off. As I said before this girl is a gorgeous and almost 60 but has a body of a 25 year old. One of the most stunning ladies that I have met.
Well things have not turned out like I was planning. Due to the extra care in her feeling, remember she is not in to swinging. I have the feels for her. I ended up getting nervous and couldn't get a hard-on. SHIT! All that preparation and I end up getting ribbed by her and my wife. They have teased me for over a week now.
I'll stop here. If there is some interest maybe I'll continue.