After just four months of dating, Reese Witherspoon and CAA agent Jim Toth are ready to take it to the next level.

A source tells Us Weekly the duo are "talking about moving in together." (The actress and mom has a $5 million abode in L.A.'s Brentwood area and a $5.8 million spread in Ojai, Calif.)

Why so fast? Another pal explains that Witherspoon and Toth, both 33, "don't want to spend any time apart."

In the latest Hot Stuff video, Senior Editor Ian Drew -- plus recording artist Matisse -- delve further into Reese and Jim's sudden happy homemaking.

Also in this week's roundup:

Exes Jon and Kate Gosselin have a tense stand-off at their sextuplets' sixth birthday bash; the Brangelina brood have a posh getaway on the Grecian isle of Santorini; Paula Abdul finally lands a new TV gig; and Jamie Kennedy taunts his former love Jennifer Love Hewitt.

Watch the intrigue-filled video now (above)!