bigmoi lujvo

It is x1's turn to have to do x2.

See also jidmoi ("turn to get to do something"), zukmoi (generic term, covering both jidmoi and bigmoi). Alternatively in the inverse order, mombilga.

In notes:

jidmoi
It is x1's turn to get to do x2.
zukmoi
It is x1's turn to do (be) x2 (ka).