Would this cross the line?  

My lady friend has this fantasy that won't go away (I owe her one, since mine was to have a threesome with her and her best friend). She wants me to pretend I am service tech (they actually need help with something I do professionally), go to her house, and have sex with her while her husband is in the house.

She said her husband will be watching the game in the basement on Monday night, and will never come upstairs. The dare gives her a thrill, but gives me the chill.

I figure the most I would do (IF I go) would be making out and maybe a bj. But I am still apprehensive, not only for horrible complications if caught, but also morally ill at ease with doing something like this in another man's house.

She once jokingly said, if not you, I will find someone else.. But I think she would actually do it.

Here is what I am thinking... please help me decide!