Want to be pregnant when in laws visit.

My husbands parents are divorced and remarried. They don’t live close to us but both of his parents and spouses are planning to visit over the summer this year. We’ve be trying to get pregnant for 2.5 years. They all know we are trying. I so badly want to be pregnant for their visit. We visit them as well but it’s expensive so it doesn’t happen as often as we would like. They would have so much fun talking and planning baby things while they visited. They could get to be around us during the pregnancy, see the nursery, etc. I really want to be pregnant and I really want it to happen soon. Would be a bonus to be able to enjoy these family things with hubby’s family while they visit. Please God, make me pregnant.