Adriana has never been anything else other than a very supportive mom to either daughter.
Gabi eyed the MC before she knew him and got drunk with him on the first opportunity.
Ximena is also curious about him, we don't know yet if it's because she's interested for herself or because of Gabi(or a faint memory in the Val path).
Ruling out the most obvious, you aren't referring to the BBQ party they are planning. I'll 'guess' you are talking about Enzo and Adrianna talking about having another baby? As it came up in a conversation between them in the kitchen prior to the dinner, and then during cheesecake with Enzo's not so subtle innuendo he wants his cake later. Or further, at the end of the dinner, when Adrianna says that if they have a girl they can steal MC?