  In this paper we find regular Stein neighborhoods for a union of totally real
planes $M=(A+iI)\mathbb{R}^2$ and $N=\mathbb{R}^2$ in $\mathbb{C}^2$ provided
that the entries of a real $2 \times 2$ matrix $A$ are sufficiently small. A
key step in our proof is a local construction of a suitable function $\rho$
near the origin. The sublevel sets of $\rho$ are strongly Levi pseudoconvex and
admit strong deformation retraction to $M\cup N$.
