Del. Fam. Ct. Civ. R. 20

(a) Permissive joinder. All persons may join in one action as petitioners if they assert any right to

relief jointly, severally, or in the alternative in respect of or arising out of the same

transaction, occurrence, or series of transactions or occurrences and if any question of law or

fact common to all these persons will arise in the action. All persons may be joined in one

action as respondents if there is asserted against them jointly, severally, or in the alternative,

any right to relief in respect of or arising out of the same transaction, occurrence, or series of

transactions or occurrences and if any question of law or fact common to all respondents will

arise in the action. A petitioner or respondent need not be interested in obtaining or defending

against all the relief demanded. Judgment may be given for one or more of the petitioners

according to their respective rights to relief, and against one or more respondents according

to their respective liabilities.

(b) Separate trials. The Court may make such orders as will prevent one party from being

embarrassed, delayed, or put to expense by the inclusion of an additional party against whom

the original party asserts no claim and who asserts no claim against the original party, and

may order separate trials or make other orders to prevent delay or prejudice.