Would it be ok to file for legal separation? If there is a such thing in PA.

>>>>>>>>>>> No , there is no legal separation in PA .

Can she really have the court to force us to put the house up for sale?

>>>>>>>>>>>> Probably not . She can tie his income up for an indeterminate time by requesting spousal support , child support and her legal fees . Loose ends need to be tied up before either of you can move on with the rest of your lives .