The Foster case has been a topic on FR over the years. Sometimes it is a hot topic and some times it is tepid. Back in the mid-90's there were several investigations conducted into the circumstances surrounding Foster's death. Leave it to say, it is one freaky case.
To answer your question, Yes. The rumored affair and the fact that Hillary was the first into the office have been discussed at great length on FR. There are many, many more interesting questions as well. The neck wound. The oven mit. Foster's safe. The "apartment". The broken x-ray machine. The color of the gun. The parked car. The phone call to Arkansas ala "Vince shot himself in the parking lot!!!". It goes on and on. Favish has a good a site as any to get all the details.
You can forget about that controversy. Mrs. Foster wasn't clear on which gun the FBI agents were asking her about. The gun at the park was blued. She thought they were asking her about a nickled one.