"My comment is that we're not responding to the disgusting insinuations being made," Lindsay's rep tells E! News.

OK, I'm not insinuating anything about the impromptu mash session, but a source does tell me that both Linds (who hasn't been shy about PDAs in recent days) and mom were partying hard that night.

Still, it's possible the photographer just happened to catch them at an awkward angle and it's all perfectly innocent. (We're not sure who took the photo, as outside cameras weren't permitted at the private party.)

But we have to hand it to them. For one day at least, no one's talking about Ali and her odd new look.