My step son wants me and her mom to be bestfriends, what should i do?

Hello, i have a step son, his name is Jack, 14 yo, he's a nice kid and we are get on with each other, me and his dad have been married since two years ago. Jack lives with us but he sometimes visits his mom.

Jack always wants me to get really close with his mom, i think he wants us to be BFF or somethin, Her mom sometimes visit us especially when he asked to. Jack always tries his best to get me and her together and whenever we meet, he always wants us to hug each other, so far we do what he wants.

For example, couple months ago, Jack asked her mom to visit us, when she arrived, Jack asked us to hug like always and this time he asked her to kiss my cheek, we were laughing, thought it was a joke but he really meant it, then she kissed my cheek, idk what to do so i kissed her cheek back, it was really awkward. After that, he asked us to watch TV together and he wanted us to hold each other's hand while watching TV

Well, actually i always feel awkward around Jack's mom, especially when Jack asked us to do thing that actually we don't want to do, he wants us to be romantic idk why. What should i do if u guys were me??

Thanks :)