UPDATE 1 - What to do about my s****r in law and h

Yesterday was my first ever post and actually the first time i openly admitted my sexual attraction to my s****r in law. Well writing about what has been happening for you guys yesterday got me all worked up and so afterwards i sent her a text message while i was still at work. Before i tell you what i wrote in the test message i'll give you a mini background to the lead up to the message. She rang me last week to see if i knew anyone that could help with some dental air pipe that they wanted to extend for the dentist practice that she manages. Due to my f****y background and upbringing i have a lot of contacts in a lot of different places (i know that sounds cheap but im just being honest). My wifes f****y always approach me if they need anything done due to my contacts. anyway i hooked her up with the owner of a medical gases company which i knew through the construction industry. So i message her yesterday... "how did you go with the dental air last week" s-i-l replied "all sorted. thanks so much for that. i guess i owe you a favor now" Its like she was willing to owe me even though what i did was nothing.. so i wrote "and how. you owe me big time". s-i-l replied "well why don't you tell me what you want" again because i am afraid of looking like a fool i just replied "no no you have to decide. plus its more fun like this". s-i-l replied "how about i come and dig a hole in your garden next time you need help witht he gardening". she said this in relation to the gardening i have been doing the past fortnight. i wrote "its good to know you are willing to get dirty to repay the favor.. lol im only k**ding.. anyway leave the digging to the expert.. plus im sure you can come up with something better" s-i-l replied "its going to be hard, but i will think of something" i wrote "it is going to be very HARD. but im sure you will think of something that will blow my mind ;p " she wrote back saying "i'll come back to you when i think of something good" we ended up sending another 10 or so text messages back and forth after that.... Do you think i fucked up the opportunity or did i play it smooth... i don't know at this stage the balls in her court... but i could really do with some advise on how to test whether or not she is willing to fuck around... your comments are really appreciated..