Do 50s couple have **

Hello my mom 52 is a widow. My wife's dad who is a strong muscular rugged body muslim man 55 age and 6 feet plus tall has recently remarried my window mom. Initially I agreed thinking of companionship but now feel uncomfortable. Can they be having ** in this old age? I don't know but I feel uncomfortable. Also if they come to visit us for some days/weeks how should I behave like what to expect?

By renot 2 days