Technically no. Being "in heat" refers only to mammals in estrus. In a practical sense, could she be hormonally grumpy? Maybe. But there are a lot of other things that could be driving that behavior that you'd have to cross off the list first.
Good to know, I though as much. I don't plan on correcting him as I don't think he'll be willing to take any information from me and as I said before I don't know him well.