This:
I refuse to believe that this kind of behaviour and Trisha literally hunting for new meat afterward would come from a simple argument they just had this morning.
Unless...
Unless their dissensions had grown over the years and Trisha just learned that Marcus had an affair.On Ophion. That very morning.With Mike.And two LGMs. Dressed as Amanda and Kelly. Dancing and singing on Gloria Estafan's Conga beats.In her lab. Tapdancing on her rocks! THAT was the last straw!
Now, that could explain why she the dam just broke!