I ran into this too... good thing I checked here before asking anything stupid.I just found a dialog loop late in the TOB part of the mod. When Edwin asks to marry the PC, Imoen chimes in about it being so cute, it loops around back to Edwin, and so on. Doesn't even get to the PC's chance to reply. Has this particular bug been reported yet?
Thank you for reporting this. Easiest way to get past the problem would be to temporarily drop Imoen out of party. Alternatively taking Sarevok to the party if you're of good or neutral alignment should help.
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