Uuuh, he did not make any F2 alliance with her:

Yau-Man (to Cirie): I do not share this information with anybody. They do not know this conversation at all. If I get the idol, I will share. And I won't vote for you. We can go a long way.

Cirie: So what about you and Jonathan?

Yau-Man: We're not that close. I didn't make him any promises. Zero promises.

Yau-Man (solo): Right now it seems my head is on the chopping block. It looks like the swing vote might be Cirie. At first we thought she was with us, then we found out she's not quite, then she started to throw my name out there. She's felt more threatened by the fact that I made an alliance with Jonathan way before I made an alliance with her.

Yau-Man: At some point you know he's going to turn on me. I have to turn before he turns on me. He will turn on me. When I find out he's going to turn, I'll let you know, we're going in.

Cirie: OK.

Yau-Man: I work through.

Cirie: Alright.

Yau-Man (solo): This is really crazy. We're only on the seventh, eighth day and already one of our alliances is disintegrating and everything is stirred up.


"When he turns I'll let you know" Riiiiiiiiiiiiiiiiight.

He didn't offer her anything. He just siad he didn't trust Jonathan and what not and was just as vague and Jonathan was being to Cirie.