Sexting

I never even gave the idea a thought until a few years ago when I got into it by accident with my sis-in-law. We have always had a 'flirty' relationship, but very innocent. Long hugs, playful pats on the ass, that sort of thing. We would also text back and forth now and then, usually sending sexy jokes. I don't really remember how it escalated, but soon the texts were getting pretty suggestive, until one day I got brave and mentioned that I had a hardon. That led to back and forth about what I should do about my 'problem'. After half a day of back and forth, we both admitted and described our orgasms. That was the start of some pretty regular sexting