Is Inflation caused by Multi-Universe collisions?

In a recent article in Discover magazine, several Astronomer's hypothesize that our Universe's Inflation (i.e increasing expansion rate) may be caused by a collision with another Multi-Universe and not due to Dark Energy. Both of these hypotheses are based on the concept that some form of energy is "pushing" on our Universe causing it to expand at an ever increasing rate. Both have merit, but I have wondered about the opposite concept that our Universe may be experiencing a "pull" instead of a "push".

If the Multi-Universe theory is valid, then it seems reasonable that the Universes are gravitationally bound with each other. In the macro realm of space-time, gravity is the strongest of the four forces if the mass of the space-time is very large. What could be more massive than the totality of the Multi-Universes? In fact, just as
our Universe exists within a space-time matrix, we can assume that the Multi-Universe also exists as a space-time matrix or fabric. Are these matrices one in the same or is there an event horizon separating these space-times?

Let's assume the space-times are separated. Even so, the individual Universes exist within a Multi-Universe space-time fabric. And according to Einstein's Gravitational Theory, gravity is caused by the distortion of the space-time fabric and not by a Newtonian attractive force of unknown origin. The distortion of the Multi-Universe space-time should cause more "distortion" near the "event horizon" than further away from the horizon. Thus, a nearby gravitationally bound Universe will become distorted along its edges more so than near its center. Thus, it will appear accelerated.

In a similar sense if the space-times are the same and there is no event horizon, then the "distortion" of the the common space-time fabric will cause the same effect between the companion Universes. Each will appear to be in a state of Inflation as they interact with the distortion in the space-time matrix. Each Universe is "stretched" near it boundaries much like matter is stretched as it falls into a black hole.

Although I have no mathematics to support this hypothesis, I have proposed it only as an alternative concept. Instead of assuming that "something" is pushing on the matter in our Universe, we should not ignore the possibility that "something" may be pulling on our Universe.