Simplify the following text for a Grade 5 native English-speaking person.
Original: It is suggested by this man that Scully ultimately initiated a sexual relationship with Mulder , as he remarked that he was very surprised when she invited Mulder `` into her bed '' . The last scene of the series finale featured Mulder and Scully holding each other on a bed , facing an uncertain future together .
Simplified: Scully and Mulder work together to find answers to cases that they have to solve .