I have always maintained a professional relationship with my two female lodgers but spending more time together recently led to a lapse in judgment

I share my house with two female lodgers. We’re all single at the moment but we have always maintained a professional relationship with each other. In the current circumstances, we are obviously spending more time together. The other week, the inevitable happened. After a few drinks, I ended up getting intimate with one of them on the sofa. The following day, she didn’t bat an eyelid but we agreed to put it down to too many beers.

The thing is, I now see her in a new light. She is 20 years younger than me and I find her sexually attractive. I’m struggling to keep that line drawn. We still have a great relationship, sharing drinks and a chinwag, but I feel different. Should I tell her how I feel and run the risk of everything going pear-shaped?