I hurt my back

I was shifting stuff around my garage and strained my back, my good friend offered to rub me down. She used liniment and it eased the strain, the next day I was feeling better. But she said I should get another rubdown and so she done me again, without the liniment. I was laying on my bed as she worked on me, and I started to feel her up. She said I must be feeling better and asked me did I want to have some fun. I said Oh yes, I really what to have some fun with you. Not fully expecting she was willing anyway, turns out she was. We've started a sexual relationship and I'm thinking of asking her to marry me to keep each other company and warm at night.