She's also stepmother to the two children he shares with ex-wife Christina ... "The dress is not appropriate. Your [sic] a mother now," and to that, El Moussa fired off a response.

including a few family shots with husband Tarek El Moussa, 43, their son Tristan, 21 months, and her stepson Brayden, 8. In the pictures, the proud mom can be seen rocking a red lace maxi dress ...

After Heather posted a series of photos to Instagram Dec. 23 that showed her wearing a red lace dress and smiling alongside husband Tarek El Moussa ... post that one.'" “Christina is doing ...

"her name is Christina," she wrote back ... And she is absolutely beautiful in that dress!!” another person wrote. El Moussa opened up about her fertility journey in an essay for TODAY Parents ...

including a few family shots with husband Tarek El Moussa, 43, their son Tristan, 21 months, and her stepson Brayden, 8. In the pictures, the proud mom can be seen rocking a red lace maxi dress, which ...