A weird use of "can" there. Did you mean "will he do it?" Or "is he morally corrupt enough to do it?"
In my humble opinion, I do believe that both is possible and most likely going to happen
I don't think he will.
Spoiler
He does kiss a sleeping Brian in the raw.
Does it start a love triangle then.... or too soon to tell...
Well, Brian didn't love Lorkan, and Ian just feels a deep sense of gratitude toward him.
Lorkan one-sided pines after Brian.
can blondie force himself on brian