Can the Chief Justice force her to recuse herself?
That I don’t know but I wouldn’t count on Roberts to be honest. Seems to me Roberts kids were threatened because they weren’t adopted from where Roberts stated they were. That was on FR awhile back.
No, but Congress can. Congress can Censor and impeach federal judges. Censor is probably best option, it just means her vote doesn’t count either side.
No. None of the Justices have that kind of power over the other Justices.
The only remedy is impeachment by Congress.